Nikon COOLPIX W300 Reference Manual page 226

Make sure to turn off the camera and underwater speedlight before attaching.
1
Attach the camera to the underwater
fiber-optic cable adapter.
Align the camera lock screw of the cable adapter
with the tripod socket of the camera, and securely
tighten the screw.
B
Notes
Make sure to properly thread the camera lock screw
of the adapter in the tripod socket of the camera,
and do not apply excessive force when tightening.
Otherwise, you may damage the tripod socket.
2
Attach the underwater speedlight to
the grip of the underwater bracket.
Securely tighten the mounting bolt of the
underwater speedlight.
3
With the camera secured, attach the
cable adapter to the underwater
bracket.
Align the case/adapter lock screw of the bracket
with the cable adapter lock screw socket, and
tighten the screw lightly so that the adapter and
bracket can move.
Technical Notes
Optional Accessories
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