2008 g35 amp install on a stock bose system

I have a 2008 infiniti g35 with the g37 body style and am trying to install an amp to my bose system. I do not know which wire i should splice into to connect my amps rem wire(blue wire) to the preexisiting bose amp. I have done all the other connections and wire running already. Does any have an image, diagram, or any sort of help for wiring this?