Mercury - 4-Position Trim Switch Adapter Zero Effort Control Link 84-896394T01. OverviewThis adapter ties a dash-mounted triple or quad trim switch into a set of Zero Effort Controls on mid-2000s Gen II DTS boats. It basically lets the older dash trim setup "speak the same language" as the control system without any cutting or homemade wiring. If your boat uses ZEC and you still want to run the multi-engine trim pad at the dash, this little adapter keeps everything working the way it should.. Ke