Vello BG-S4 Manual page 7

4.
Align the camera's tripod
socket with the BG-S4's
mounting screw, and insert
the camera's connection
plate cover into the recess.
5.
Rotate the locking wheel
counterclockwise until it's
firmly tightened.
7
6.
Connect the shutter release
cable from the cable release
socket on the battery grip
to the Multi Terminal on the
A6300 body.