warn winch solenoid

Hi guys I was wondering if there is anybody out there that knows what the small thin black wire that goes into the winch solenoide is for and where it goes? I had to take it out a while back and now I cant seem to remeber how the wires go. L I looked around but cant seem to find a diagram out there similar to mine. I have an 09 outty 800 with a 3000lb warn winch. Thanks