They're self-adhesive but I didn't trust that so have made some brackets to hold them on.
Consider fitting one of these:
https://www.amazon.c...SAF1QRT1D1XH65R
or one of these:
https://www.amazon.c...ABTK7W58E6KB9J5
in the top of the rear window. The first one is 24" long and may not work with the curvature of the screen but the second one at 12" long should work better. I've got two 8" versions fitted, one in each rear window of my van and people certainly notice me braking now!
How did you attach them? I have a clubby estate so same door set-up
Haven't worked out how to neaten the wiring yet.
https://www.flickr.c...3/shares/X549b2
Looks very good. My'no drill'policy is the bit that's stopping me doing something similar.