Second hose going away from the camera, prob 3/8 hose.
Goes into the inlet of the turbo bit seems to have some kind of valve on the end? Maybe a one way valve? It's a strange fitting, it's loose as the hose tail wobbles if pulled but can't be tightened up in side the metal part.
Have a boost issue that I can't resolve and while looking for boost leaks I found that fitting is loose, could maybe suck in unmetered air.
Any one know what it is/what it's for