ATHENSG37

Maybe this has been posted before and I didnt see it. I have a 09 g37s coupe with the Bose system and was going to hook up a Line out converter to the stock radio with a amp and sub. Do you guys hook it up behind the deck or after the amp or does it really matter? Ive seen mixed opinions depending on the make and model of the car. Also anyone have a wiring layout/diagram for the stock stereo wires? Thanks.