I installed a 76 cb550f right hand control on my 75 cb550k. Its in great condition and Ive found all the wires in my 75 550k harness except for one. There is a black/red wire coming from the control that I cant find in the harness. I did find a brown/red wire coming from the the fuse panel according to the wiring diagram... maybe thats the one I need to plug into?