Mercury - Auxiliary Trim Harness Secondary Trim Connection 84-895388T02. OverviewThis auxiliary trim harness lets you hook up trim wiring for a helm-mounted trim lever or any secondary trim control you want to add. It's made for DTS boats running panel-mount controls and gives you a clean, reliable way to bring an extra trim input into the system. If you want more convenient trim access-or a second trim point for the helm-this harness makes the wiring simple and straightforward.. Key Features •