My 996 has a CDR 210, I want to add a small Bazooka Powered Sub behind the rear seats just to fill in the sound. I need help with a wiring guide to connect the line level converter. My car has the Hi Fi Sound option with the amp in the trunk. I know to run a fused hot from the battery, a ground, a switched hot from the radio and the RCA's all to the rear.

What wires do I tap into to connect the line level converter and the switched hot for the amp to turn the amp on and off with the radio power?

Thanks for your help!
Rob