We have two versions for you here. One is the bracket without holes, here you simply use double-sided adhesive tape to attach the bracket to your cupboard.
However, if you want to be on the safe side, you can download the file with drill holes for countersunk screws and screw the bracket into place.
A little tip: we have been using this double-sided adhesive tape for several years: https://amzn.eu/d/d3S3fJZ
Der Autor hat dieses Modell als seine eigene Kreation gekennzeichnet.