Vacuum hoses on air intake

[BoostBoy]

The previous owner of my Sportivo had put a CAI in. It now has the standard air box in, but there is a vacuum line on my air intake that has a screw in the end of it (highlighted in red). Where does it originally go? Also the adjustable solenoid in this pic (highlighted in green)...is that for idle adjustment?

[BoostBoy]

Sorry can the mod please move this to the Sportivo section

The previous owner of my Sportivo had put a CAI in. It now has the standard air box in, but there is a vacuum line on my air intake that has a screw in the end of it (highlighted in red). Where does it originally go? Also the adjustable solenoid in this pic (highlighted in green)...is that for idle adjustment?

[3zzfe]

Vacuum line must return into the airbox.

Take a look at the lower side of it, should be the inlet.

[BoostBoy]

Vacuum line must return into the airbox.

Take a look at the lower side of it, should be the inlet.

Is the solenoid supposed to be screwed into place on the airbox as well? And one other question, would having the vacuum line out, would that cause any performance issues, as I have noticed some but it could be unrelated.