Garmin Control Unit ECU Power Cable Threaded Collar f/GHP 12 & GHP 20 Electronic. 5mProvide power to your electronic control unit (ECU) with Garmin's electronic control unit (ECU) power cable. Simply wire the electronic control unit (ECU) power cable to your boat battery as one of the last connections made during GHP installation.Compatible Devices:GHP 12 Autopilot System GHP 20 Marine Autopilot System with Smartpump Specifications for Garmin Electronic Control Unit ECU Power Cable Threaded Collar f/GHP 12 & GHP 20: Manufacturer: Garmin Color: Black Package Contents: Garmin Electronic Control Unit ECU Power Cable Threaded Collar f/GHP 12 & GHP 20 Garmin 010-11057-30: Control Unit ECU Power Cable Threaded Collar f/GHP 12 & GHP 20 Electronic