I was having the same issue trying to attach the NanoSat to the stand. I guess they can be attached by forcing the "slot head" through the "U" shaped bracket. I tried that, but figured there was a mistake because the hole in the bracket seemed way too small. I'll try again...
Any tips on feeding the wires through the poles of the stand? I guess I got a thick set of speaker wires, which can still be fed through, but its too tight to maneuver in any way, and I have no idea how to pull them out the other end. Any tips would be appreciated.
(updated next day: I was actually able to attach the speakers to the stand fairly easily, I just didn't want to force anything before. I ran the slot-head screw through the U shaped bracket a few times, then was able to fairly easily attach the bracket to the stand and the speaker to the bracket).