I tried searching all over google and couldn't seem to get a direct answer. I'm looking to add a single sub to my FFS. I found a good signal wire and got the power to the trunk. The last thing I need to do it get the LOC hooked up. My LOC is 2 channel with 6 wires coming out of it (2 ground, L +/- and R +/-) do I have to tab both the rear left and right speakers to the LOC? Or would tapping just one speaker be fine? If I tap just one should I combine the L+ with the R+ and the L- with the R-? Also when I looked I found that I have 3 speakers in the trunk (I have the Sony system), the Left and Right seem to be a bit larger than the center one. Would it matter what speaker I tapped into?