I have a pair of old Criterion 4X speakers that I just yanked out of storage. I wanted to hook these up to hear how they still sound. I can not find the old manual. I noticed that there is a red dot above one of the speaker connections. Is this for the + connection from the amp or the negative? I sure don't remember. Perhaps it is not important. However, the Technics amp manual did mention not to cross the leads to avoid damage to the circuitry. I am new to this forum.