Hash, there's no disgrace in the not being familiar with the connecting links on the M60s, since it's a rather useless feature. This has happened here before and although as I recall you're only the third one to admit it, I suspect there were other occasions. What we're still curious about is whether you had(or still have)the speaker wire connected to the top posts or the bottom posts. The bottom posts are connected directly only to the woofers and led someone who had switched from the M50s(only one set of posts)to the M60s about two years ago to be puzzled by the very "muffled" sound of the M60s(woofers rolled off above 200Hz). The top posts are connected directly to the mid and tweeter and not connecting the woofers would have led to a rolloff below the 200Hz crossover which the M60 uses, but having little response below say 100Hz probably would be less noticeable than having little above about 400Hz if only the woofers were connected. What say you?
