I just put in one self tapping screw about 3 inches long and left an inch or so sticking out.
It's great to hang a bow right there by my left hand. Hand a thermos on during gun season or hand a gun on it with a sling but normally once I'm set up the gun will lay right across the bar in front of me.
I use it to attach my pull up rope and to wind it up on the stand when I put it away as well. All from one well place 2-3" self tapping screw.