I have been working on my mini's engine swap since February, and finally almost have it completed. I cannot remember where this plug goes though..

 

I was just looking at pictures from my engine swap earlier this year to help ID that connector. I saw it in some of my pictures when I had the engine and transmission out and seems to be toward the rear of the engine compartment.

Is it power steering related? Aren't there 2 connectors on the power steering pump (heavy gauge wire and smaller "normal" sized wires) and then the connector for the power steering fan.

 

I wish that was it, but I never unplugged the power steering. The cable only reaches to the top of the starter when routed under the heatshield.

 

Transmission reverse light plug. Put the car in reverse with the ignition on and see if your lights come on.

 

You are right on the money. It was the Transmission reverse light plugin right below the shifting linkage.

 

Wrong thread.