I've managed to install an aftermarket deck and speakers into our GS, but would still like to be able to power up the Nakamichi amp to run the sub. I've come across a few conflicting posts for the remote turn on, but nothing for which wires I may be able to tap into to send an audio signal to the amp.

I already have a remote turn on wire and a set of RCA's run to the trunk, so all I need is some guidence as to where to connect them. Thanks in advance.