utvgiant 30″ cree light bar install

So I’m in the middle of trying to mount the light bar on top of the utvgiant aluminum roof. I can’t for the life of me figure out how to use the brackets given from the roof and the light bar. There is no directions to show and I’ve tried 6 different ways to get this thing to fit. Please help!!

Any pics of it installed on utvgiant brand aluminum roof?