my 260 used to have A/C but it was yanked when it was raced. I was working on the wiring harness for the wipers and washer fluid and trying to figure out why they were not working. we forced the motor to work by directing power from the battery to the harness from the switches on the steering column and verified that the harness from the steering column to the motors works. then I traced the harness back and looked at the connectors in between the steering column and the fuse box the black connector "C7" (according to haynes manual) under the blower and all of the copper connections are green so bad that there is no copper in sight (leaky blower

 

here is the connector

 

There is a post in the for sale area for 240 Z parts. He might have one for you.

 

here is the pipe to the blower

 

You might also want to see if you can pull the wires back a little bit. If you can find some good wire you can splice into that and rebuild your connector. As for the water connector. You can pull it off and take it to a hardware store and try to match it up. or just order a new one from MSA.

 

that is ok
I am going to make my own connector because in the future I plan on installing a laptop or some type of computer (pentium 1 or 2) and make a program that runs off of dos and the whole computer will run on a solid state memory stick