I might be going about this the wrong away, but here goes.

I like to use my Sawstop table as my flat reference when cutting Dominoes on the edge of board.

I have a magnetic fence that works as a backstop.

But when doing the dominoes, sometimes the boards have a slight bow, that means there's a slight gap between the table and the work piece. I can usually press the workpiece flat, to the table, with a couple of fingers, but these fingers are also on the hand that holds the front of the Domino tool, so I'm pressing in one direction while trying to keep the tool positioned.

A toggle clamp, that would ride in the tables saw slot, to clamp the wood, would be perfect.

So I think I'm looking for T nuts/bolts that would possibly fit.

My other thought is to build a base, for the clamp, that uses a 150lb Magswitch.