I just bought an old 1987 Jon boat with a 9.9 HP Suzuki motor which is wired to a key ignition. I need to install a safety kill switch lanyard and have no idea how. The ignition has 5 wires marked as MAG, SOL, GRD, ACC, & BAT. The lanyard has 2 wires (white and a ground). How do I connect the safety lanyard into the ignition?