I removed our old (darn near antique) toilet today which had 4 bolts holding it down, and am installing a new toilet with just 2. I know the back two attach to the flange but what did the front two attach to? They are so rusted that they broke off and I cannot see how they attach because of all the rust. A new sheet floor is going down over the top so I'm tempted just to break them off, how could/should they be removed? ....i've tried vice grips, its just breaks off more rust!