Not sure they had any. It was illegal for blacks to join the military until just a few weeks before Lee surrendered (March 1865 was when Congress finally allowed free blacks to fight, they formed one unit and wanted to parade them but were unable to find uniforms or weapons to even do that, and surrendered before they ever saw combat.

There were blacks fighting for the Confederacy not as members of the military though. John Parker was one. Was sent to Richmond as a slave to help build up the fort. When the fighting started was forced to man a weapon and said “We wished to our hearts that the Yankees would whip us. … We would have run over to the other side but our officers would have shot us if we had made the attempt... we only fought because we had to.”

But of course when you look at Confederate soldier pensions, benefits etc, you can't find a single colored soldier.