I don't know much about how to do this but my daughter is wanting her subwoofers put into her 2002 Pontiac Grand Prix GTP. I have looked at the rear speakers and the right one has a light blue and dark blue wire with a clip connector running to it and the left one has a yellow and black wire with clip connector running to it. Her subwoofers are two 8" enclosed in a box with a red and black connector for each sub( the connector is like what you see on house speakers) so my question is how do I wire the two subs? I have heard you could tap into the rear speakers and that is what I want to do if I can. She has factory everything. I am not adding an amp at this time if I don't have to. I know her system is not going to boom loud. Thanks in advance on any help given!!!