Those are actually the mounting points for a vent cover.
You need the MaxxAir II Vent Cover, (old # MA00-933072)
You can verify that be calling the fine folks at eTrailer. They're always great to work with. 800-940-8924
Every day's a learning experience, though sometimes not what we expected.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley