Yep, that's the housing vent. Route it up inside a frame rail, secure it with a couple of zip ties with built-in screw holes, and cover the end with a bit of window screen to keep bugs from nesting in the end of the tube.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!