You can definitely use the hitch itself, by putting the tongue of the hi lift INTO the receiver.
An even safer method is to get a shackle and hitch attachment, then use the tongue of the hi lift inside the shackle (from outside the receiver). This is a bit safer because the shackle will not roll off the lip of the tongue on the high lift.
Be careful lifting from the rear like this though. You've effectively made your truck into an unstable tripod when you lift it from the center with a hi lift.
I would recommend getting your hands on a video that reviews basic on hi lifting and recovery. Far too many people have no idea of the danger in using a weighted hi lift. This is the video I would recommend: http://www.bb4wa.com/products/DVD.htm