Vello BG-S4 Manual page 5

Shutter release button
1
Hand-strap mount
2
Locking wheel
3
Anti-slip grip
4
Tripod socket
5
Battery tray compartment
6
Cable-release socket
7
Mounting screw
8
Connection plate cover recess
9
Control lock switch
10
Battery tray
11
Battery tray lock
12
Battery springs
13
Battery slot 1
14
Slot 1 contacts
15
Slot 2 contacts
16
Battery slot 2
17
Battery 2 latch
18
5
Battery pack adapter
19
Battery pack adapter contacts
20
Multi-Terminal Shutter Release Cable
21