I thought of that, but there are two issues. First, it would take some engineering to mount that connector box to a round tube hitch. Second, I really only need the four-flat connector as I have not, in the twenty+ years of owning a truck, ever needed to tow a trailer with electric brakes that required a 6 pin connector. So I'd rather not tear up my dash, interior, and bed panels to add something I don't need. The Mod-Lite box does the same thing as the Honda relay system except you can run the battery wire underneath the truck.
So now I have to decide whether I can wait the 4+ weeks for the aftermarket to get everything together in a package.