How do I fit my arch spats? :(

Hi there,
just recieved by set of arch spats.

It came with 4 clips and 2 rivet sort of things lol!

Any idea on how to fit these as they came with no instructions and i dont want to attempt it and ruin something :/

Do I drill holes in the arches or??

Would be really grateful if somebody could help me

(Sorry if this has been posted b4)
Cheers Jacob.

does your car have the holes for them or are you retro fitting them?

No my car has no holes for them
How do i retro fit them?
or its there any way that I could stick them on maybe? I just dont wanna get tonnes of moisture behind the spat and cause rust!
Cheers.