Im planning on getting a Basslink or Bazooka (powered sub with the speaker-level inputs), but I keep hearing things about me having to remove the rear seats/headunit to access the wires to splice into the new sub. Do you have to do that, or can you just cut the wires from the Bose sub, add wire, and connect it directly to the sub? And what do you do about the turn-on lead, is that the additional wire that is running to the stock sub?