Basically, I balanced it on top of the TV. I know, not the safest or smartest, but I am going to build a shelf and mount it behind the TV at some point. I cut the speaker wire to a presice point so it can't fall in front or behind. I wouldn't recommend it though. Just build the shelf behind it instead.

Can you share with me how you got your center channel to mount on TOP of your TV? I have an almost identical setup and I couldn't figure out how to mount my speaker on the top.