My bike has mounting holes.

You need the screws that come with the lock and a 4 mm hex key.
Line it up.
Hold the lock against the mounting holes. Choose the bracket slots that leave room above the tyre.
Enlarge ↗Put in the screws.
Put the supplied screws through the brackets and into the frame.
Enlarge ↗Tighten and check.
Centre the lock and tighten the screws with a 4 mm hex key. Check that the lock clears the tire.
Enlarge ↗