Fixing a mistake

I made a sweater for my mother and I put the buttonholes in the 2nd row instead of the 3rd can you think of any way to make this work without tearing out the whole edge? I was thinking of a fold-over clasp of some sort but I dont know how to look this up? Kinda of like a clasp on a pea coat?

http://www.ascuteasabutton.com/clasps_frogs.html

Maybe something along these lines? Try googling buttons, clasps, etc. I’m sure you’ll find what you’re looking for.