2005 cts v sub add on

i have a 2005 cts-v with bose audio system I'm trying to find a wiring diagram or any information that would help with a zapco amp install. I'm looking to use the symbilink cable but am unsure if the sub channel will provide a good enough signal for the amp. i took the amp out of my 2003 acura which also was running a bose system but i was able to install the symbilink cable directly into the right and left channel speaker wires in the rear deck  my cts only has a sub in the rear deck. my other question is if the sub channel signal is strong enough is it ok to hook both left and right channels on the symbalink cable so i can bridge my amp?

tedmond what am i looking at ? first off im looking for a complete diagram or at least a diagram that deals with the rear speaker channels or possible some install advice from someone who has some experience with symbilink installs.  

What you are looking at is the wiring diagram for the back of your factory radio.

If you are trying to run a sub off of your factory system the best way to do it would be to get a line output converter and tap into the Front speaker wires comming out of the radio. Usually the wires comming off of the amps are too much voltage for a line output converter.

You can tap the front wires for the LOC, run a set of RCA's from the LOC to the symbilink, then run the symbilink cable to the sub amp.

well i just got around to doin the install on the amp and i have another qeustion about this diagram on the right speaker channel which light green is is the positive and which light green is the negative or should i guess