Boxster 987 roof / clamshell access

Hello. My 987 boxster roof is broken , no electrical function after flooded control box. Main roof moved back manually about 12 “ but the clamshell is firmly shut , and can’t get to any of the parts under it until it will open. None of the videos I have watched address this problem, which is how do you release the clamshell from inside the cabin ? Spent several hours on all the forums with no joy
Please help !
Thanks
Bruce