You don't have a frame!
If the bumper is mounted well, then it should be a fine pull-point. If not, the brackets kludge posted would work very well.
The problem with the unibody Cherokee is that the force needs distributed a lot. Otherwise, you can just pull through the sheetmetal.
That why I asked, this bumper is suppose to be heavy duty and curious how to add D rings to front bumper. Also, how thick of steel should a rear bumper be that can have D rings attached to it? I'm considering making my own rear bumper...