[Christ]

I see. You're going to have to remove that antenna, then.

The VG antenna (shark fin) is just a cover that goes over your existing antenna's stub, so the camera won't fit in it unless you remove the stub of the existing antenna.

Alternatively, you may be able to fit the antenna stub into the very front of the shark fin's housing, then mount the camera so that it protrudes from the end a slight amount.

Mounting the camera in the shark fin as high as it will cleanly fit will help you keep some of the view to the sides, as well.