Proclip and passive holder - how to fit?!

[Schooleydoo]

Bought the two together, thinking they would somehow screw together, but the proclip i have is just a flush piece of plastic with no holes etc. Am i supposed to drill my own?

Heres everything i have, am i missing anything?

[URPREY]

There should be some dimples in the car mount where you can drill holes to match the passive mount. Take the swivel base, put it over those dimples and mark them with a Sharpie. Use a drill with a small drill bit and drill the holes, then attach with the provided screws.

[Nikumba]

The screws are self tapping, so decide where you want to put the bracket, take one screw and just use some pressure and screw the screw in and will cut into the plastic and be fine

[Schooleydoo]

No dimples Prey, its completely flush. Can drill/use the self tappers but i just thought they might have forgotten something and wanted to check first. For the money it all cost, I thought it would slot together somehow! Cheers guys.

[URPREY]

Weird. Mine all had very small dimples. If not, drill a small pilot hole so you don't crack the plastic and mount the swivel.