I just got my license plates. Honda has provided only the two top holes to hold the back plate and cover in place. Any suggestions for securing the bottom? Did anyone drill holes? It wouldn't be a problem leaving it with the two holes only, but when I closed the back door the plate and cover clanged loudly, and I don't want to bend the cover out of shape. By the way, why don't they provide four holes on the back as they do on the front?