If its what I'm thinking (the sliver shiney bit inside the headlight) then its held in place with a net of springs.
Yours may have come loose and the reflector will be unnattached with anything else except the bulb wires.
If you remove the chrome rim from the bucket part-theres a little screw hidden on the bottom of this, the reflector is held to this rim it should only need undone enough for the rim to slip off,its not meant to come out(but it will if you keep undoing it

). I had to put this all back together when I had this bit powdercoated on my monster, the springs are assymetric and though you can fit them the wrong way round it only seems to all go back in securely if they are fitted the correct way.
Watch out for the springs falling out,you'll need those.
