First he cut a hole in the plastic box of the 626 arm-rest.
Then he soldered a cut cinch cable (stereo) to the left & right audio output of the cardock circuit board. This was easy thanks to tObys iPod dock pin assignment description (german only).
The inner part of the cardock from outside.
Now the screwed both cardock parts. Ok he also used a little bit of hot-glue.
Time to place the plasic box back into the arm-rest.
Here you see the cables coming from the cardock.
Action ;-)
The bottom line.
Without the ipod. Remember: Wash your fingers or the felt gets diry.
Hide and seek.