Depends if the Vent was "Bedded Down" in a sealant when installed! If it was just a perimeter seal job you would also need to seal around the fasteners as well as the Holes you are referring to! Good Catch! Do you also have the Covers and Clips? Youroo!!
Good point on whether the vent was bedded down in sealant. Who knows, right?
I think I'll add just enough Dicor in those gaps to "encourage" any water to drain away, but not interfere with the cover clips. Looking at the pour pattern, it almost looks like they intentionally avoided the clips - which was part of my question, I guess.
There should be putty tape under the vent ridge. The clips are for the Maxxair vent cover, it's set over and held in place with hairpin style clips, which go thru those loops.
Since it looks like you don't have the vent cover, I'll recommend that you consider getting them. With the vent cover, you can leave your vents opened a bit almost full time. Keeps rain out even in heavy rains. Also keeps air flowing and avoids mustiness.
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Yea, get the cover for it. Get with the "in" crowd! I had sealant around the tabs on our 1400 dometic vent, and since the 1400 covers are unobtanium, I just drilled holes in the 1500 cover for the plastic rivets. I had to dig away some sealant around my tabs, but otherwise it installed well. It's nice not having to drill more holes in the vent to add a cover.