The Hole up there is usually 14 inches squared. Similar to fan hole in bath. The seal up there is foam compressed type. (Unless they are using something else lately). If you hit ac, you only moved 1/2 inch or so. But, you need to figure out if you damage the square hole enough to leak into the ceiling or run down the walls. Now, this I do not know. But, can you seal unit extra by the space between ac and roof? Then, tighen the 4 bolts from inside RV. Otherwise, time to lift the unit till you can replace gasket and inspect damages...
