Mercury - Rig Center Breakout Harness V10 Accessory Harness 84-8M0187098. OverviewThis breakout harness gives the V10 rig center an easy way to branch out signals without cutting or splicing anything. It keeps the wiring neat and predictable, which makes life a lot easier when you're adding accessories or cleaning up an older layout. The black finish blends in with the rest of the rigging, so nothing sticks out or looks patched together. It's a simple, steady piece of wiring that helps the whole