Loose hose in engine bay

[saskak]

I think that is the water in diesel hose that comes from the fuel filter. Say you want to decant the water that has collected at the bottom of the fuel/diesel filter, then one would turn the knob at the top of the fuel/diesel filter and water will flow out of this hose. It is not supposed to be connected to anything, only kind of sticking at the bottom of the car.
Not the best of light for the photos, but it looks like it is going upwards toward the fuel filter and the texture (plastic corrugated wrapping) is the same as that hose. See if it goes to the bottom of the fuel filter.

Edit: too quick to post and did not read it is a petrol version. Not too sure if these have fuel filter, probably yes, so potentially the same thing applies?

Cheers,
Saskak