Finished the harness and putting it in the car

I finally finished the wiring harness and have tripled and quadrupled checking each connection. I am still apprehensive that it will all work. I do have one stray wire that I can not figure out where it goes. It is a white and black wire that originates from one of the 2 plugs for the gauges. One plug has 2 Black and white wires coming out of the same connection. One wire goes to the dash light and the other I have no clue. It obviously goes to another light??? All other wires are accounted for. I didn’t put connectors on some of them as I thought better to make them a little long and cut in place. That’s one job I wouldn’t want to do again for a long while!!