Back 60Mpx CCD with firewire broken !

[ALAIN]

Hello,
The firewire connector on my 60Mpx back doesn't work anymore, due to improper handling (foot on the cable, and crack!).
Can you tell me how we can open the back and reach this part. Maybe this is just a track to solder ... (HB asks € 2000 to repair!).
I am thorough and this kind of dismantling doesn't scare me too much, but when I know the right process of course!
Thank you in advance for your help.
See you soon,
Alain (from France)