I am installing a new Infinity BassLink in the trunk of a 03 Accord EX-L 4dr. I am using speaker level inputs to the BassLink from the rear speakers. On the rear speakers... which side of the input is positive and which is negative. I don't see any +/- markings on the speakers (unless I'm missing it), but on the metal enclosure of each rear speaker I see a green dot that someone, I assume at the factory, drew beside one side of the inputs. Is this to mark the polarity, and if so, is the side with the green dot the + or the - side of the input?

Thanks