The are two small metal pins in the bottom corners of the case, take care not to misplace them.
When reassembling, take care to ensure all buttons, and rubber button pads are located correctly BEFORE securing the motherboard.
When reattaching during reassembly, take great care to ensure volume slider piece is correctly aligned with potentiometer tab on motherboard, otherwise volume control cannot be changed.
Likewise, I used a tiny drop of glue to put the lens back in place. Take care not to dirty the lens.
Agreed, ribbon cable looks upside down in picture