A note to anyone with the misfortune to disconnect the battery by hitting the button in the hatch WITH
the passenger seat motored all the way back. A big whoops. The reconnect button in a 2006 V8 Vantage is unreachable with the passenger seat all the way back. With the battery disconnected the seat has no power.
You can't jumpstart the car in this condition but connecting an external battery powers some of the systems including the seats. Power the seat forward to expose the battery reconnect button.