I have read what seems to be countless threads on how to do this, and I am still confused. I have a 2006 Mazda 6 S with the Bose sound system. I have two 10” kicker subs and a MTX 1000W amp, I want to install them in my car but I’m not sure what is the best way to go about it. I saw threads saying splice into a black/red wire, and the next one says nothing about this wire. So I’m looking for a straight forward way to install my subs with the best sound quality with the factory unit.