Mercury - 3-Pin Extension Harness (15 ft) Rigging Accessory 84-8M0191745. OverviewThis 15-foot extension harness gives you extra reach between the rig center's 3-pin steering breakout and the electric steering actuator. It's useful on boats where the shorter leads just don't reach comfortably, or where you want the wiring to run in a cleaner, less cramped path. Each actuator uses its own harness, which keeps things simple and prevents the wiring from being pulled tighter than it should be. With