Wiring Anyone?

So I'm putting in these reverse gauges and there are wierd wires...I'll see if I can get my cam workin and post some pics. But I need help on what to do. I dont know what to do with the ending of the long wire, and my guage cluster has 3 wires coming out, but the wiring for the switch has 4 connecters, so I'm at a loss.

not an answer to your question but another question, where did you get your gauges?

I got them from ebay...and theyre perfect. Just make sure if youre going to take that route, you get the 90-91 set. All the ones marked 88-91 wont fit since the gauges are slightly different.