I have a 1985 chevy c10 305 with TH350c with lockup touque converter and it has a/c .There are seven wires that come through the firewall from behind the heater box, They all had been previously cut off by the former owner in the engine compartment. Can anyone tell me were these go and were they come from. Can not find them in any wiring diagram. Colors are brown, green, blue, light brown or salmon, black, and 2 yellow. Thanks Keith