There is a footbox, and a shelf. As you have it set up in the picture, the head end is to the right, with the shelf. Shelves have the tie out attached to them. There is another portion of fabric designated for the feet on the same side as the shelf, but at the opposite end. Make sure you lie on an angle with the ridgeline, with your had and most of your shoulders on the side with the zipper. Butt and legs go on the other side of the ridgeline.
BTW, with the triangle rings for the straps, I do not need to back them up with a knot. In fact, until you release the tension a little, they are difficult to loosen at all.