Instead of using the black piece of 2X2 steal tube that comes with the kit, I mount it to the tongue of my trailer. This required new hardware and drilling new holes in the rack to extend the two top brackets. You also need to drill a few holes in the trailer tongue. Drilling holes in steal is very easy if you also pick up some step bits and oil your bits as you drill. These bits cost about 13$ at Harbor Freight.
The end result is a handy universal rack that is sturdy and easy to install. I can carry two coolers perfectly on this rack and it frees up a lot of space in the back of my Suburban.