Idaho, the mini hoist attaches with one pin to a receiver hitch on the trailer. It's to lift a car up using the winch primarily to gain access to catalytic converters. I just built the hoist attachment today.

The winch only pulls slightly upward on a car once the car is loaded and the deck is tilted back level. It still pulls mostly forward so it's not a problem on junk cars and hasn't been a problem on nicer cars either really because at that point you can push the car forward by hand if needed.