Have a DB9 Vantage V12. Forgot to connect battery conditioner. Totally dead

Cannot get trunk open, for jump/charge connection.

Battery is under passenger seat. The Driver and passenger seat are in the far back position, and I can’t get to back seat access panel.

Is there a way to manually lean the seat forward, or manually slide forward, with the battery being dead?

Thanks!

 

Jump connection is under the hood. Front and center little black box with a + on top. Use the alternator case as the ground point.

 

thank you!!!!