First: Posting pictures on the MOC isn't too difficult once you know the process. Lots of members do just that. Be sure to take the photo in Landscape mode.
Go to
https://www.montanaowners.com/forums...ad.php?t=70323 and read posts #8 and #25.
Second: That looks like a slide topper that has come loose. I seem to recall this ia brand new RV so the dealer should take care of it for you.