The cable at the coupler above the headlamp on the drivers side has probably popped out because the the cable attached to the bonnet lock is seizing.
Apparently this is a known problem.
I had this issue, in the end had to take drastic measures to get the bonnet open. Worst case being you would have to break various front end parts to get the bonnet open.
I found the cable at the lock to be totally seized. Broke it loose, re greased it etc. Good as new. Removed the lock, cable etc.
Whilst speaking to the dealer about this, its so common they carry, bonnet locks, cables etc in stock!
Regards.