[mwebb]

drill and tap
use a something / anything
(you can use a simple compass)
to measure from the hub and strike a mark on each of the five spokes , such that the marks are all equidistant from the hub
drill and tap either a 1/4 x 20 or 6mm x 1.o hole there

if the holes go all the way through , position the wheel cover on the wheel and mark the wheel cover through the holes in the wheel
or
make a template with some paper
drill corresponding holes in the wheel cover , install bolts and


the plastic does not cut into the tires on my application , others have said that it may