The self drilling screws along with the 2 grids with the custom connector plate worked flawlessly on my install.. The screws went right into the channel on the back bulkhead and easily supports all the weight now on the grids. The custom connector plate joins the 2 grids together and once painted black not visible at all and does not interfere with placing items in the adjacent holes. The only suggestion I would have is some kind of plastic or vinyl caps to cover the screw heads for a more finished look.