The halfmoon has a removable piece where the JP version VX lense cover resides. You can pop this out and drill a hole or fab something for the camera lense to mount to.

Alternatively, you can buy the CF halfmoon that's currently on eBay (Naoki sells them - talk to dutchie) and mount your camera in there, for a much neater install. Just a couple of options...

-- Best, John