I am using BMW X5 with Thule load bars, so I end up attaching the awning to the end of the load bars with bolts. A little bit of work, mostly because the space is a bit limited for tools, but I think that end result is quite nice.
I suspect that I will have to come up with some solution to cover the gap between the awning and tent/car so that it would be fully rainproof, but we will try this setup now and see what modifications will be needed later.
I have to say that I found it strange that the awning did not come with any bolts to attached the mounts to the awning.