i am puting on a autometer water pump guage on as i type (electrical) and the back light works great. just about to make my final connections but my last wire says connect to the ignition. but there are so many wires on it and i dont want to mess with it cause it works great and the car is a antique (LOL 79 rabbit) is there any other place i can put this wire? (i already have the guage backlight installed on the head light fuse) what does this wire do??????? thanks guys!!!!