while removing my rats nest, i busted a hose off the carb, and i'm not sure what it is. I can't seem to locate it in the manual, and the MazSpeed tutorial doesn't touch on it.

it's located right below the shutter valve. in the pic you can see the hose still on the nipple.

what is this for?

 

the pic didn't post for some reason

 

some emmisions crap...dont worry too much if you capped it off.