[RodW]

Shouldn't be a problem. Easy to test before going final, too...

 

[RodW]

I don’t see an issue with doing this, just asking in case someone had more experience. Now trying to find a pvc plug for this piping. Turns out it’s “vacuum tubing” pvc and the walls/diameters are not the same as say schedule 20 or 40.

Agreed. Adapters are available. For example,
Imperium Central Vacuum 2x2 Vacuum Pipe to Schedule 40 Adaptor (1) (amazon.com)

(You could also wrap the pipe with duct tape to get a tight fit and fill the cap with a very thick adhesive since this is a vacuum line and it won't blow off. I would by an adapter, though.)

Back to wiring: Since there are only two wires, no other outlets can rely on the one you pictured. Cap them off and test the other outlets.