Looks like A-45 to me as well. Went out and looked at wiring. The BW from the clutch connected to A45 clamps to the top of a compressor and goes to the clutch as the wire closer to the vehicle center line. The other wire at the clutch, closer to the fender, is the ground wire and is also clamped to the compressor. I haven't traced the ground path.

1987 Raider 2.6L 5 spd w/ LSD off road package 130K miles
1987 Conquest 2.6L 5 spd w/ intercooler 56K miles
2000 4Runner locking RA 34k miles