Looking at this thread:
It looks like you unscrew the bezel on the top of the head and take out the lens. Then you unscrew the pill at those two notches. I can't be sure though, I'm just guessing.
Looking at this thread:
It looks like you unscrew the bezel on the top of the head and take out the lens. Then you unscrew the pill at those two notches. I can't be sure though, I'm just guessing.