Thanks for the compliments guys. The website is a lot easier than the car building.
My divider (from Ames) didn't come with provisions for hanging it on the seat hooks. It is actually cut-out around the hooks. The general consensus that I have gotten is to use 4 small sheet metal screws to attach it to the "Y" supports. The car was disassembled when I bought it, but I did find 4 small screw holes in that area, so I am assuming this is how someone else may have attached it.
It's no big deal as the rear seatback will sandwich it anyway, but i just wanted to do it right.