Hi, Just bought a dvd player deck and I would like to know for speaker connection, if: 1) tapping into the existing cables is a good idea OR 2) using some sort of an adapter to plug into aux in RCA (stereo) For option 1, will it work without shorting the factoy connections? For option 2, which adapter is needed to plug into the aux's 2 rca plugs from the deck's 4 rca plugs?