Quick question about the screws on the back of the QS4s:

There are 2 screws in the center of the back of the QS4s directly above the binding posts. They don't seem to be holding anything together, but I can't be certain that they don't hold something together on the inside of the speaker (without taking it apart).

Are these screws suppose to be used for mounting purposes, for example, if you're using a bracket like "The Full Metal Bracket"?