I am working on my 1990 GXL and I am in the process of replacing the Primary Fuel injectors and the upper intake manifold (Exten Manifold) gaskets. I have come across a stray connector with nothing connected to it. It appears to be a single sensor wire connector. It comes across the top of the engine near the primary injector electrical connectors. I have attached a pic.
Does anyone know where this should connect?

 

How many wires and what's the color?

 

Knock/detonation sensor?

 

Aux fan sensor..which you do not have so not needed to hook up.