Hello, thanks for the reply.

It's a TD42 1990 wagon.
I was looking at it today, so it had no push button for AC or a loom that I can see, but I had sorted a new control panel, condenser and a dryer, I have a few random pipes aswell as a compressor.

I'll throw up some photos for reference but I'd suspect I'm still missing parts.

The evap is connected directly to those pipes but it is the only thing that is AC related on the car.

I guess mounting all the hard components isn't too bad, but the plumbing is the tricky bit??

As for the loom just a feed to the compressor as on off would be enough?
Do you know how much wiring there is for the whole system?