Alright, I'm new here, just got my 2014 Maxima roughly a month ago and I am in love with it. So I ordered and installed a K&N CAI and I have a small tube (possible engine vent tube?) left over that was connected to my stock. I am not referring to the breather tube, as I understand that is only part of the stock intake. Anyways, there was no pressure or vacuum coming from this tube. No liquids. And from what I can see looking into it, it was quite dirty/dusty.

Believe it or not, I didn't have a flash light on me so the picture is SUPER dark, but I tried my best to snap a picture and also attached a picture of where I BELIEVE it is coming from. The red circle signifies the area the tube is coming from, and the blue circle is the tube I THINK I'm referring to, hard to tell though. Any feedback is appreciated

 

Actually, the tube I'm referring to may be the smaller tube near the bottom left corner of the circle. (corner of the circle? haha) Sitting right under the bigger tube.

 

That's the exhaust vent for the transmission