I know this sounds dumb. I have a 1980 Mobile Scout Vaquero 20' There is a sofa that converts to a bed over it is a upper bunk you fold down the face so that it converts to a bunk. The face has 2 doors so you fold it up and use it as a storage cabinet. I opened it by pulling it down, and now it will not fold back up. I can not fine a latch a latchs on the sides nor can I fold it back up. A piece of plywood is under the mattress and I can not understand how it folds It looks like it is one piece. My husband works late and has not had time to check it out. I am the one that has been doing the cleaning and getting it ready for repair Can anyone tell me what I need to do?