Once you have the door pad off your there, that’s all you get the steel stays there. pull all the paper or plastic off and look inside the holes in the door, you may need a mirror to see what you are doing but usually this problem is just that the lock rod has fallen inside the door and you just need to push it back up threw. If by chance it has fallen off the pivot that it was on you will need to find it in the bottom of the door and find the little clip that holds it on, then simply reinstall it on the pivot with the little clip after you have pushed the rod back threw the hole.