Oil Pressure switch on TBI Engine

[bradford]

I got a TBI crate motor that Im about to slap in my truck next weekend.
I noticed it had what seemed to be two oil pressure sending units. One on top and one by the oil filter.
I assume it is for the TBI computer.
This motor has the mechanical fuel pump provision on it. I guess because its a crate/replacement engine?
I am putting an Edelbrock manifold and carb on it.
What do I need to do to utilize one of these oil pressure units?
Do I plug one of them? I guess I could use the unit off my current motor?
Thanks