The "relay" was painted over but I dont think that it was green. Natural metal color I think. My schematic show a black-orange going to the heater blower which is correct
The other connector on the relay has three wires:
1. RED, to a 30A fuseable link and then to ...??
2. BLUE, which goes to a connector mounted on the housing the holds my AC condensor (this is a three prong plug and I dont know what its for or where the other two wires are supposed to go)
3. BLACK (or purple?? it was dark)...can remember where that goes

fudge...I always post when I am short on time....I will try to get a pic posted later today and maybe that will help a little more.

BTW: the schematic I am using was found on google image search "1965 biscayne"