A picture of the vent would help. There are a couple methods used to retain the vent flap. I believe to open the vent you have you push up on the "clips" with your thumbs and rotate them out. My vent has 2 small clips that you just rotate out of the way of the vent which would be different from yours.
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2014 Palomino Puma 25RS
2011 F-150 Super Crew XLT
Days camped in 2014 - 23 Camped 2015-47
Camped 2016-71, 2017-33, 2018-29 booked
KT4W
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