Mercury - Rig Center Breakout Harness V12 Transmission to Stringer Harness 84-8M0173596. OverviewThis harness gives the V12 rig center a clean, direct way to pass transmission signals over to the stringer harness. It keeps the wiring simple, which really helps when you're working in tight spots or trying to keep things from turning into a tangled mess. Everything lands where it should, so you're not guessing which wire goes where later on. It's the kind of piece that quietly keeps the whole setu