The City Light jumper wire can be connected via the snap type wire splice by opening the side marker wire connector and locating the wire that powers the running light. The wire, of the 3 present, is the one that is not paired and has an empty connector socket on the same side. Carefully make an incision into the plastic insulation jacket that holds the 3 wires, find the proper wire and make the splice. Cover the cut into the insulation with the electrical tape.