Here and
here are probably the best pics on the web on how to use this. Also the best pics on how to properly recess and mount the dustwashers so they don't obscure the marquee.
Just remember, the T-nuts go on the top of the wood, and the joystick bolts go from the bottom.
(On one of my projects, I was securing a model train table to a workstand and I mounted to T-nuts to the bottom and when I tightened the bolts it pulled the T-nuts out.

)