Mercury - Transom to Rig Harness Rigging Accessory 84-8M0206582. OverviewThis harness links the transom gear on a Mercury Racing 450R to the rig center when you're running a TVM Lite steering setup. It keeps the steering and control signals moving cleanly from the back of the boat to the helm without needing any improvised wiring. The length and layout make it easy to route through the rigging tube or tight corners. Once it's in place, the system usually feels steadier and more responsive.. Key