Rapide S Battery Reconnect Problem
 

After a collision the airbags been deployed, now the car is back into it original condition although few bits left etc, there seems to be many error messages showing on dash, every time different messages as if the car is gone mental, from reading the forums it seems like its normal when a battery is disconnected. As a result of changing battery and during the repairs, new battery was still connected to the car for a month and I believe this has drained the battery, time to start the engine, it clicks but does not start, annoying message as usual 'check battery switch off' after enquiring with Aston Martin and other reputable firms I've learnt that Aston Martin has discontinued the battery switches disconnect in trunk / yellow reset button next to battery under rear seat for example like earlier models, I been told AM Rapide has switches for disconnect / connect under left rear seat, I checked and it is indeed the case that the switches are taken out by Aston Martin as there's no need, now the question is how do I re-connect the battery switch, could the switch have blown due to airbags being deployed or is there a manual method of re-connecting, someone suggested I try bypassing or try to switch the car on with a full 700 amp battery, Aston Martin said a full battery once connected should automatically connect to the switch. Any advice would be appreciated, Also for Rapide S the seat calibration seems to be different than DB9 and vantage, please state how to recalibrate if anyone knows, thanks for reading. Really want the engine started

In addition, the batteries are being charged by a specialist and they said the new battery i purchased is weaker than the previous battery, I decided to have both batteries charged max to full 700 amps, the low voltage is a worry, hoping this is indeed the case.