the sport20 badge is like a giant thick rectangle decal, no plugs that go into the holes. Don't worry, the 323f one i sent ya will fit, i did a test fit with my other spare 323f one.
i really didn't have to fill the holes, just the perfectionist part of me that wanted to give the sport20 badge more surface to bond to and the psycho part of me that didn't want water/rain going through the cracks and seeping into the holes to mess with my wiring or rust my inner trunk =P