Need wiring help! High Idle?

Hey all.

I just finished replacing my motor with a used one on my 94 K1500.

I have a wire plug that comes out of the same wires that run to the fuel injectors, and cannot figure out where it is supposed to go to. If I remember right, its a blue and red plug. Does anyone have a clue where its supposed to connect to? I have a high idle, and I suspect that this is the culpret.

Any help would be greatly appreciated!
Thanks in advance

I dont have my haynes book in front of me, but just going off your high idle problem, I would think it would go to your IAC motor on the TB.