Factory A/C operational question

[D-Day]

I've been looking into this more since the heat has been on lately, and am trying to get together some change to start getting components to do it. One thing I may have some trouble with, I can't find my connector plug that goes to the compressor clutch. I took it off 7 years ago, can't remember if it was cut or where it went. Anybody have some pictures or ideas as to where/what it goes to? There's a few stray wires under there, so I just need some direction...

This task is seeming more daunting, at least financially. Still need to get the compressor, lines, drier, o-rings, take it to a shop to be flushed/filled/etc. Aye yi yi. By the time I get all the separate components new, it'll be at least $500, not including shop fees for charging it. And even then I might need something else...maybe I should just wait and get a Vintage Air system and have everything brand new and laid out. Not feeling confident about this.