If you take the shrink tubing off and examine the PCB/wiring, I bet you will find that the "-" side passes straight through. As other have said, wire the input side of the crossover to the "main speaker" (or the amp output) and the other end to the tweeter.
Edit: FWIW, the +/- is for phasing purposes. Speakers/drivers don't have polarity in the same way that, say, the amplifier power does.
Last edited by SouthArk370Z; 11-12-2013 at 11:28 PM.
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