If you are going to use those covers I would use other side where the punch out plug is now. Just use that side with the broken tabs for oil fill cap. Make sure there is no loose pieces ready to break the rest of the way off into engine.
I was thinking this. Just think of how "good" I am at putting in a self tapping screw, in an already tapped hole... I wonder how drilling out a big hole in the covers will end up. :poke::rofl: