keylesss entry passenger door wont open help

[harrysdog]

hi guys thanks for any help in advance will be most appreciatted
i have a sr yaris with the keyless entry system (uk) problem is front passenger door will not open , i think i can safely assume the solenoid is stuck i have removed the top of the inner panel however i can only remove it at the top as the doors is locked so i can only reach in so far to investigate , however to make matters worse , i reached in to try to feel for the solenoid and somehow the cover on the lock over the two cables has come off which has caused the bottom cable to come off . i know its probably a simple lock however does any one know how i can open the door to remove it and buy a new soleniod any pictures would be really appreciatted thanks again great forum loads of info