Bikes a cracker mark, like the black n white decals.
My 2012 ossa has the low level fuel sensor on it, beside the throttle body.
Not 100% on this but i think they are thermistor type sensor, works something along the lines of sensing the temperature difference between being immersed in fuel (keeping it cool) or exposed to the air allowing it to heat up and somehow create a circuit but don’t quote me on this I'm no expert.
Anyway there is a bunch of mini connectors at the head stock for the display (ossa use the trail tech vapor) the connector your after is there though i can’t remember of the top of my head the wire colours, I'll check mine first chance i get and update this.
Also you must use a conventional bulb as led’s won’t work.