Working on a 1993 F150 5.0, E4OD. Have a wiring connector that I can't find the mate. Connector is behind top rear of engine; black in color and round in shape; two wires 1) black and 2) white with red tracer. Help please

 

Can you post a picture?

 

Tried but could not get the connector in a position to get a decent photo. Will make another attempt.

 

The knock sensor is back there at the rear top of the engine. Maybe that's what it goes to? I can't remember what color wires were used.