I struggled a bit with the ribbon cable connections, they need to be lifted up from the side the cable enters. They are sort of hinged like a door but lying on its side. Once it is stood up vertically, the cable will pull out. For the longer one I found it was important to lift as much of it up at once otherwise it will break if you lift one end and not the other. Once the cable is reinserted, they can just be pushed back down, same as before, supporting the full length when you do. If one comes off it is possible to push it back onto the hinge but it is very very tricky and took a while.