INTERNAL
USB
Connection to PC for configuration
SIM Card Socket for SIM card for network access
EXTERNAL
Radio Modem
BNC connector for external radio modem antenna when used with the radio modem option.
4G Main
BNC connector - main antenna for network connection
4G Aux
BNC connector - optional antenna to improve reception for network connection
GPS BNC connector - GNSS antenna connection  - GPS, GLONASS, Galileo, BeiDou
Charger Binder connector for power input / battery charging