I bought a 91 camaro with a 96 Corvette grand sport engine and transmission it looks like the new drivetrain was put in using a painless wiring harness, but there's a few spools of wire that aren't hooked up. The only one that still has the tag on it is the green reverse lamp wires( which makes sense because I don't have reverse lights)
I'm not sure if the green reverse light wire and the white wire come out of the pcm or not, but I know the purple and brown ones come from the 2 bottom pin connectors