A/C Compressor Question

[fj55mike]

Hey, all
My girlfriend recently aquired a '90 Camry 4-cyl, and it's in absolute mint condition except for a leaky A/C compressor. I traded in the broken one at a Junkyard today, but upon further inspection, the new compressor is slightly different. I looked up the part number, and it's from a V6 Camry. I have some questions about whether or not I can use this one or if I should go looking for another one.

First, it's got a Solenoid looking doohickey on the end:



where the original compressor didn't have one. The junkyard owner was adamant that this didn't do anything and I could just hook up the rest of the compressor.

Also, the electrical connections are different:



I know that the connector on the left turns the pulley clutch on and off, but I'm unsure what the one on the right does. It has two wires going into it.

Here is the compressor connectors:



I know that the single black wire coming out is the clutch controller, but I'm hoping that the two other wires correspond to the two wires in on the car. The solenoid doohickey on the end of the compressor also has two wires coming out of it, are these related to the other wires?

Anyway, I really appreciate your help on this, as it's pretty miserable here in El Paso with no air in the middle of summer!

Cheers,
Mike

[Doctor J]

Connector on the right is for comp.rotation sensor.
The four cylinder model requires different compressor.
According to Kragen.com, vehicle application, the same a/c compressor used on 4 cylinder models with 2.2 and 2.0 engines.
By the way, I see a nice alternator on the picture