Ziggy,
I have the m60s too. If you are not bi-wiring (and why would you?), you want to keep the "bridge" connected between the top and bottom connectors - and it does not matter which pair you connect the speaker wire to. Just be sure both top and bottom posts are tight. As far as bi-amping, I believe that you are correct in your thought that the top posts are for the highs and the bottom posts are for the lows. But would like confirmation from Ian or Alan. (I am at work and don't have my manual to refer to)
Randyman
