Technical 3 wire connector?

[Kimpa]

I have a Fiat ducato 2017 Bürstner.
I was taking a canle through firewall and i had to remove the fusebox over the pedals.
And i found a connector just hanging from the fusebox.
The connector was a 4 wire but it had only 3 wires and i cant see where its gonna connect.
Can sombody help me identify the connector

 

[jackwhoo]

It is most likely for an option that was not fitted to your vehicle at the factory.