Behind all the plastic on the right side (the plastic with the air vents in it) below your monitor there is a white plug (9 pin?) dedicated for a radio. When the plastic is off you may have to cut some zip ties and look in like your looking under the right arm rest to find it. Wire colors should be something like red/blk, red/grn, red/yellow, etc. It will have both switched and unswitched power so the memory presets will remain.