1958 Chevy Fleetside with original gauge cluster with 350 sbc, one wire 100 amp alternator, HEI distributer and electric motor fan. When the electric motor fan kicks on it would send the amp gauge from the middle of the gauge to the far right. This let me know my fan was on and that my alternator was putting out current. I rewired the entire truck with an EZ Wire kit and have either overlooked it or it did not come with a wire for the amp gauge. The amp gauge has several connectors on the back of it and I don't know what wires it takes to get it going again,,,,,, any suggestions?