Does is really matter what lugs you connect to when it's the only speaker in the game? I thought that was just for when you've got multiple speakers in the same cabinet and you wanted to make sure they were all in phase. Like maybe in a guitar cabinet that has 4 speakers in it. You want them all to be moving out and in at the same time. When it's just one speaker, I don't think it really matters.
Sure, it's probably best practice to hook it up "right", but I thought I'd check my logic.