I've been pondering the same issue. One button kills it left to right and the other right to left.
Mine came with the same kind of stops that slide in the scale on the front of the table. Since the scale on my mill is the mount for my DRO glass x axis scale, that's out.
I have to find some time and look for other locations. My other thought was to open the box and wire "extension" switches in parallel with the existing ones. The new switches would be mounted to the base cabinet at either end of the table. That's on the list right after the box cutting tool, the stand to put the DRO display in a better location, the engine I started today, the remount of the lathe compound DRO, hanging the new shop lighting, etc.
Best
Stan