It's identical (I think) to the one Ben used in his Wii laptop as seen on Engadget, so it's capable of stereo audio:

Which pins do I connect to an amp circuit like this:

(Ben's audio amp diagram as seen on Engadget)
or this:

(Rekarp's audio amp diagram as seen on longhornengineer.com)
This is essentially the bottom view of the slide pot and what I've figured out so far:

Any help would be appreciated.

