I need to be able to wear this as a backpack. Conveniently, I found that the bottom had 3 wheels.
I carefully removed the wheels (just required removing the screws), and used the screw holes to mount some connecting rings.
Then I added some padded, adjustable straps. They weren’t quite the right length. The backpack dangled far too low on my back originally.
I ended up having to shorten the straps, cutting the stitches on one end, and restitching them at a better length. The ends dangle, and I’ll probably need to shorten and/or stitch them flat later for neatness, but at least they work now.
It’s not the best stitchwork, but it works well enough. Now the straps are in a range where, if anything, I might need to adjust the straps longer using the built in adjustment hardware. Just about where I wanted it. Shortening these straps didn’t take long at all to do.