1972 Corvette A/C compressor wiring

[Chicago Stingray]

I have a 72 with A/C, the plug and wires are missing. I know the black wire goes to ground but where does the green wire get its power from? Where should it connect under the hood?

 

[SRountree]

I have a 71, and the manuals for it. I can scan the wiring diagram for you if you want it.