Boat power trim-tab position indicator
Lectrotab

Connect the two conductor cable's BLACK wire to the engine battery negative. Connect the RED wire to the engine ignition switch so that the gauge is powered up when the ignition is turned on. Engine battery voltage can be from 10 to 30 VDC. When the indicator is ON, the battery drain will be about 8MA. The indicator is reverse polarity protected.
The four conductor cable (W4-20-G), which may be lengthened or shortened as
necessary, terminates in a plug which mates with a receptacle at the control switch. If this receptacle has been provided, plug the indicator plug into it and the installation is complete.