I have a 2016 LT with the Bose system. I want to add a subwoofer. With the Bose system all the speakers are powered. Accessing the amp is very easy in the wheel well. How can I get the wire master sheet to tell me what wires I can jump off of with out messing up the system? I just need a bit more bass. And it is an easy enough install. I just need to know which wires are which.