Need help identifying what this plug is suppose to go to!

[FakeFordMechanic]

New to the forum so I'm hoping I'm posting this in the right place! I bought a abandoned project off my brother in law and he absolutely tore apart this engine. I have one plug I can't for the life of me find a connection for. Does anyone know what this is or what it's suppose to go to?? Any help would help! ~1986 Ford Ranger 2WD 2.3 GAS~

 

[Curious Hound]

I don’t have a clue. But to help those who might have a clue, what are the wire colors and what is it close to in the engine bay?

 

[Curious Hound]

Egr valve position sensor and throttle position sensor would both have 3 wires.

 

[Uncle Gump]

As dirty as the connectors look... it appears to have been disconnected for awhile.

 

[FakeFordMechanic]

I don’t have a clue. But to help those who might have a clue, what are the wire colors and what is it close to in the engine bay?

I've updated my post with a picture of the wire colors. Red, red/black, and teal?/black

 

[FakeFordMechanic]

Egr valve position sensor and throttle position sensor would both have 3 wires.

Those are already plugged in.

 

[FakeFordMechanic]

As dirty as the connectors look... it appears to have been disconnected for awhile.

I was thinking that it doesn't have a mate but I can't really find anything that says either way. Bothering the hell out of me!