I cannot find the proper plug to jumper to get the new air compressor to kick on so I can service the AC system up to the proper pressure. I see 2 switchs, 1 is on the front of the compressor (clutch switch plug?) and the other is around the back side of the compressor but it is a 3 pin plug. Both my other vehicles have the 2 pin plug at the dryer, this car does not. Please help, I brainfarted and left my Chilton's at home this morning so I don't have the wiring diagram.

Thank you,