On my 1967 GTO with factory AC I need to replace the Master relay for the heater blower. There is currently an incorrect one there not working properly, but I have a correct one, a repopulated from OPGI. There are three terminals, numbered, and I know I need to connect the black with double orange stripe, the gray, and the brown wires to the relay, but the wiring diagram doesnít specify which wire goes to which terminal. Can anyone help me? A photo would be very helpful as well. Thanks!