Where does this hose/line GO?

LOOK @ the Black hose that connects to the top of the airbox and to the engine/valve. off of the VALVE. there is a small very skinny WHITE almost CLEAR plastic hose ........If it were a vaccum must it be pluged in some where right now mine is out what should i do? i cann't remmeber if i pulled it out or already was out or where the hell it goes thanks

You can also see this in maybe pic's that ppl have posted such as 2phast's webpage and the 190e air intake mod on this site.