This is actually beyond easy. I used a WET11 bridge.

The trick is, as the faq says, the standby timeout. This too is easy to bypass. When you turn off the car in the garage, the 'peg goes into standby for a bit before turnin' off. If you stab the top button, it goes back into "on" mode and will stay on forever. You can go inside and connect and synch, and tell empolde to "turn it off" when it's done.