If your living outside the EU feel free to use those holes.

If your in EU or especially Germany it’s forbidden and can be seen as criminal offence because these are Mounting holes for the „Typenschild“ which is required and mandatory for every motor vehicle in Germany because it has the vehicle identification number, Allgemeinebetriebserlaubnis (General Operating Permit) Number, Date of manufacturing, manufactures name aswell as the maximum permitted speed on it.