Supra Sunsport 20V Owner's Manual page 84

Optional Boat Buddy
This feature makes loading your boat on the trailer much
easier.
Loading
Place the trigger in the "SET" position. When the bow eye
contacts the Boat Buddy, the pin will latch, securing the
boat.
Unloading
To unload the boat, pull back on the trigger and locate it in
the "SAFETY" position.
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