Mercury - Power Center Harness (4.0 m) Rigging Accessory 84-8M0210398. OverviewThis 4-meter harness is for 20-35E electric rigs where the power center sits well away from the control post. It gives you plenty of room to run the cable cleanly through a longer rigging path without stretching a shorter harness or forcing awkward bends. The extra reach helps keep the wiring relaxed and makes the whole setup easier to service later.. Key Features • 4.0 m Length - Ideal for boats with a long helm-to-p