Noob ISC/PCV Mistake - With Pics

[Mr Hardware]

So
My car's been running a bit rough lately and i had the bonnet up to show a mate of mine, and we're looking at the PCV Valve, and i'm like what does it do, and he's like i'll show you and pulls it out but in doing so, whoops, he snapped off where the other end of the PCV line connects to up near the ISC. Now a picture paints a thousand words:


and obligatory GK-style hands in photo shot:


So this black F piece is snapped off on the second bar of the F and the tail of the F has a sleeve go over it and connect to this white plate sort of thing. My question is, what is this F piece for and is it LPG specific or do most AU's have it?

And no my question isn't where do i get a new mate, in case you were wondering