Can't get the ribbon cable in

The lock broke and I can't get the ribbon cable back in. Am I screwed? The cable came out super easy and nothing had broken. Trying to get it back in has been like wrestling an eel. The lock fell off and the ribbon cable won't slot in no matter what I do. I can get the lock back in without the cable and it stays. Can't get the cable in though.

The idea of do it yourself repairs is a nice idea, but nothing stresses me out more than ribbon cables and jst terminals.