Need help identifying plug.

I started laying out my newly converted wiring harness on the engine to do some clean up and tie up loose ends. I found a plug that runs down the same section as the wire that go the starter and cannot find where it plugs in at. This may have gone to something that is not on the engine such as the e-fan. I can't remember unplugging it so I am asking if anyone knows what it is and where it goes? Thanks for any help you may provide.

http://i1049.photobucket.com/albums/...e/Untitled.jpg

After watching a video on youtube I figured out that it is the temp sensor plug that accidentally got sent down the wrong side of the harness.

Does anyone know the correct part number to the three pin temp sensor so I can make it communicate with my factory guage in the dash?

http://www.ls1truck.com/forums/lsx-t...-ls1-swap.html
Look at post #3, #5, and #42.