Here is a video of a my total load control install. at the end of the video you will see my updated top plates and that they do indeed fit into the bumpstop holes. Looking at your axle from the rear, the plates must be installed like so:
Drivers Side Passenger Side
______l__ Differential __l______
EDIT: Found a pic of what its NOT supposed to look like. If your plate is in place like this, flip it 180 degrees so the "tab" that sticks up is lined up with the bumpstop hole.