When the case is opened some parts may come adrift - note the red sliding switch fits over the switch component underneath. Also the pink button for the top lamp flashing function can drop out easily.

The cable for the main lamp fits between the hinge tube and the outside of the casing as shown in the third photo.

In the second photo just above the strap recess to left of the pink button switch, you can see a small horizontal metal contact - make sure this stays in this position, as it is the retainer for the top lamp bulb.