I greet you from Slovakia. I have old a vespa ET 125. Scooter dont functioning oil pressure control light. The scooter did not have an oil sensor, so I installed it and also an oil indicator light, it was necessary to adapt the electrical wiring. + pole from the white cable through the blue one, put it in the connector, - pole, I took the gray wire directly from the light bulb and connected it to the oil sensor through the brown wire.