He repositioned the docking connector so that it was attached to the inside of the docking sleeve instead of the outside/backside of the docking sleeve.

This means that, to be fully docked, the player does not have to be inserted as far into the docking sleeve. So the player fascia can sit flush outside the dash trim instead of having to cut the dash trim to accept the fascia.

This may or may not be useful for your particular vehicle. It worked well for his.