Vello BG-C18 User Manual page 7

4.
Inser t the battery grip's
power contacts into the
camera's battery chamber.
5.
Rotate the thumbwheel
counterclock wise until
the grip is secured to the
camera.
7
6.
Connect the shutter release
cable from the 2.5 mm
remote cable socket on the
grip to the remote port on
the camera.