That looks like it would work fine. It just needs to have the edges be tubes like that so the top two hooks can grab on. The bottom hook-on-a-bungee will hook onto either side of the center support of that rack.

I think I got mine off of their ebay store at the time which was a little bit cheaper, but it has been a really long time so I don't remember.

Edit: Their installation guide here shows how the system works so you can see what kind of rack it would attach to