From BavAuto catalogue:
1) Access your factory amp (some one else needs to tell where that is cuz I have no clue)
2) Unplug factory wiring harness, connect it to the Infinity Basslink harness, and plug harness into factory amp
3) Mount Basslink chasis in location of your choice
4) Turn on, turn up, and rattle your brains (I added that part)