Plug on ac condenser 69 Polara

[polarnj]

1969 dodge polara
I have these open prongs on the ac piece under the hood, can't find what's supposed to plug into it. Where does the plug come from? I'm assuming it's one of the wire harnesses on the pass side? Can't find the plug anywhere

 

[Big_John]

That is a low pressure switch. It keeps the compressor from coming on if the freon is low. It's attached to the dryer.

That said, I don't think the '69 used that switch. Probably the dryer it's attached to was changed and the switch left in to plug the hole.

 

[polarnj]

Hmm didn't know that it didn't come that way, probably explains why I can't find the plug