For a period of time, Hughey was a Lieutenant in Shoup's battery.

From The Alexander Papers:

Head Qtrs, District of Arkansas
Little Rock, Arks., Sept. 29th, 1862
Special Orders }
No. 8 }
I. Col. F. A. Shoup will have charge of the organization of the artillery from N. W. Arkansas. He will assign suitable officers to duty in the company now unorganized, and recommend them for appointment.
II. Lieutenants Huey and Miller, P. A. C. S. will report to Col. Shoup for duty.
III. John Keely, conscript of Pulaski County is hereby detailed to special duty in Q. M. Dept. and will report to Col. Jno. C. Bass, A. Q. M. at that place for duty.
IV. F. M. Benson of Company “B” Matlock’s regiment is hereby detailed on extra duty to work on Telegraph line from this place to Fort Smith, and will report to S. C. Bakery for duty.
V. The resignation of Capt. J. C. McGowen, Asst. Quartermaster is accepted to take effect from 1st October next.
By command of
Maj. Genl. Hind
R. C. Newt
A. A. Genl.

Hd Qtrs & etc.
Camp on Mulberry & etc., Nov. 8th, 1862
Special Orders No. 35
And the following named officer are assigned to duty in “Shoup's Mountain Battery” to be attached to the same brigade:
J. C. Shoup Captain
W. M. Huey 1st Lieut.
W. A. Miller Jr. 1st Lieut.
G. F. Halliburton 2nd Lieut.
The assignment in each case to be subject to the confirmation of the War Department

Official Records, Series 1, Volume XXII.Headquarters Arkansas Cavalry Brigade
Camp near Dripping Springs, Ark.
November 29, 1862
Report of Col. Charles A. Carroll, C.S. Army, commanding Arkansas Cavalry Brigade
Captain: In compliance with General Orders, No. -, of even date, I have the honor to make the following report of the conduct of the forces of my command in the engagement of the 28th instant;…
Of the mountain howitzer battery attached to my brigade, and commanded by First Lieutenant Hughey, only one section was serviceable…
In moving the battery from the first position taken in the morning, the carriage of one of the pieces was so badly
broken as to render impossible to moving of it by horses. Notwithstanding the gun thus dismantled was under a galling fire of the enemy’s artillery, shells bursting by the minute around it, the cannoneers dismounted, and, under the direction of their officers, bore the piece, crippled but triumphant, to the rear. Just before reaching the second position taken by my brigade, as alluded to in the above report, Captain Shoup, the commander, and Lieutenant Halliburton, of the battery, met me. The captain at once took command of his company. There was now but one serviceable gun of the four-gun battery, which was placed in position frequently during the day with a skill and energy deserving a more substantial battery. After passing some little distance beyond the top of the mountain, this gun was placed in position and opened on the enemy. Notwithstanding the energy with which it was handled, it was dismantled by the enemy’s artillery, the carriage being broken to pieces by their heavy shot. This casualty was followed by a cavalry charge made with great energy. The officers, unwilling to leave any trophy in the hands of their country’s enemy, took the gun from the shattered carriage and bore this, too, to the rear
The loss the brigade sustained is as follows: Colonel Monroe’s regiment, 3 men slightly wounded, 4 horses killed and 1 wounded; Lieutenant-Colonel Johnston’s regiment, 5 men were wounded and 2 men are missing; Captain Shoup’s battery, 3 men were wounded and 4 horses killed.
Chas. A. Carroll,
Colonel, Commanding Brigade
(Col. Charles A. Carroll to Capt. E.G. Williams, Asst. Adjt. Gen., 4th Div., 1st Corps, Trans-Mississippi Army)
[Shelby’s report of same action]
"I noticed also with much pleasure the gallant conduct of Captain Shoup, who commanded his little howitzer well and delivered his fire with great coolness, effect, and precision. With this battery was a brave and fighting driver, who was conspicuous for his daring and the readiness with which lie obeyed all orders."
Alexander Papers,

Footnote
Wm H [M] Hughey
1st Lt, Capt-8th Ark Battery

4/2/63 Clarksville, Gen Cabell to Gen Cooper-...requesting that Lt Hughey late of Capt Harris’ btry be appointed Capt of Artillery and ordered to report to me for duty.
He was elected 1st Lt in Dec, 1861…He came west of the river with Gen Hindman...
He is now in command of a 3 gun battery in my command and I find him competent, faithful and industrious...

7/30/63 W M Hughey signs for forage at Ft Smith as Capt com battery