...
Required installation equipment.
Aside from the equipment described in the video, it is important to ensure that the unit contains an active SIM card and the harness connector with cables.
Connection to power.
Connection to ignition system.
Immobilizer connection.
LED’s indication.
...
These instructions apply to both the connection of the K2 gateway to an external fuel sensor like (and the connection of the unit to an internal fuel sensor - How To Configure 2 Fuel Sensors With K2?