Originally Posted by WizardOfBoz

So the current brake lever has a recess for the head of the bolt. Probably a socket head (allen wrench) bolt. If one wants to reverse directions of the bolt and nut so that a nut goes into the recess, one can
1) Put a long bolt through the frame in the opposite direction of the original bolt. This essentially leaves a stud sticking out of the frame. Put the bolt levers, spacers, and washers on as originally constructed. One is then left with a need for a nut that fits in the recess. One could use a socket head nut, but this would require some pretty exact setup of the bolt length. Or, one could use a nut like I pictured. The shoulder goes into the recess leaving the nut hex exposed for tightening.

I would add that I don't recommend this as the original design using a socket head cap screw (SCHS, aka an allen bolt) is probably stronger than the modified setup.

Going back to a question asked earlier, why is this change being contemplated?