Step 2...

You will see the the dipped headlight section is made up of an adjustable mechanism that is separate from the high beam and indicator section. This section is held by two arms, one of which will have become disconnected.

To fix this, simply push the reflector back on to the arm.

Check the adjustment of the arms by turning the hex sockets on the side of the fitting. Ensure that you correct the adjustment to what it was before.

Clean the reflector in order to remove any finger marks.