I am working on cleaning up my 95 Sportster and under the dash I have an orange and a black wire and I am not sure what they hook up to. I found a copy of a wiring diagram for the 95 Speedster and the orange wire attaches to a half circle then the other end of the half circle goes to ground with a black wire. Can anyone help me figure this out? I think I hooked up a stereo to it years ago.