Passenger Front Door Locked - Will not unlock/open

[gadgetgricey]

Hopefully someone may be able to point me to a diagram re this as not having much luck.
Found plenty of threads on the issue and already tried car unlocked and remove battery with no success.
Managed to start to peel top of the door card away from door, and can now see the hole where the interior door handle cable goes into the door, but not having any luck unlocking the door in the depths within the door.

Does anyone have a diagram (or can link me to one), so I can get an idea of what I'm looking at behind the metal skin, so have an idea of where I need to pull.

Cheers

Dave