Mercury - Upper Helm Harness Dual Engine Next Gen DTS Helm Harness 84-8M0157215. OverviewThis harness handles the upper helm on a dual-engine, dual-station DTS setup. It gives the top station its own clean connection into the system so it isn't sharing cramped routing with the lower helm. Once it's paired with the lower harness and the helm-to-helm extensions, both stations stay in sync without the wiring turning into a mess. It's a simple, steady piece that keeps a two-helm layout feeling organ