A simple bracket that slides into the slots on an Apple II+ or Apple //e and and holds a pushbutton. I included one that fits on the left or right side. I also included the FreeCAD source file as someone could re-use the hooks to mount something other than a pushbutton.
I printed these with all supports enabled, and used a little needle file to remove a bit of the remains between the hooks. That allowed the bracket to slot into the Apple snugly.
The author marked this model as their own original creation.