If I understand this correct the instructions say that they don't require any power input for the gauge to work. My autometer had to be fed 12 volts to work. Is this right? There are two wires coming out of the 4 wire harness that are for LED lighting. Do I still hook them up? I also have two other wires for the gauge light. Are there two sets of light s on the newer whiteface dipricol gauges? I just don't want to hook power to the two xtra wires if I am not supposed to. I don't want to fry the gauge. thanks in advance.