I just found another chart that mentions light green is a GMC color for the auxiliary for Backup lights, I think it is the center screw, hmmm maybe I figured this out myself. I guess I don't have to hook anything up to the black screw. hmmm

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85