Can anyone tell me how to open the exhaust vent? We have a 2015 Torque 325. Looks like there are 2 clips, but seems like they would break if we try to push or pull on them. Also, on our water hook up, there are 4 choices - Winterize, Tank (for filling fresh water), City and Normal. Can anyone tell us what Normal is for? One more question, the screen that pulls down in the back - when the wind blows, we noticed that it is open on the sides. Is this supposed to be in a track or something? Thank you.