Panasonic CF-20 Series Operating Instructions And Reference Manual page 13

Rear Camera
<Only for model with Rear Camera>
A. Camera Indicator
B. Camera Light
C. Camera Lens
D. Back Cover
The shape of this may vary depending on the model.
E. Release Latch
F. nanoSIM Card Slot
<Only for model with wireless WAN>
G. Battery Pack Latch
H. LED Indicator
<Only for model with built-in bridge battery>
: Battery Status
<Tablet (Top Side)>
A. Strap Hole
B. LED Indicator
: Battery Status
: Power Status
Off: Power off/Hibernation
Green: Power on
Blinking Green: Sleep
Cannot power on or resume due to low temperature.