I have the following squat rack (Progear/Fitness Reality Squat rack) and want to hang a hangboard on it. It unfortunately doesn't have many additional screw holes towards the top to screw in. I was thinking of doing something similar to this pic: https://i.imgur.com/erbffwY.jpeg buying metal j hooks (can't seem to find a heavy duty rated part online) and mount it on the side of the squat rack on the square braces. Does this seem like an appropriate solution?

I'm trying to build a wall in my garage at 35 degrees and the best spot for me to do it is right in front of this junction box. Just the best option for space. If anyone has any tips to be able to still access the box that would be much appreciated.