I made a custom wrench to get to that bolt on mine. Basically, I bent a 13mm box wrench almost 90 degrees, then cut it short and welded that to the end of a big screwdriver again at about 90 degrees. So it goes up from the bolt, then forward, then up again. That way it worms around the front of said annoying box.

I'd be interested in removing it too though, if it's possible.

-Rog