Neilda, Yes they can and work very well. They also stop the screens "pulling" out at speed or in strong x winds. (2011 4/4)
But fitting is not so straight forward, in that the side screens must be aligned with the w/screen pillars and at the right distance. I was lucky with the distance but had to do some work on the side screen set up to get them parallel with the pillars. Dismantle the side screen & adjust the position of the supports. I needed to elongate the bolt holes to allow a little movement. I stuck the U section straight on to the factory flat "rubber" as that allowed the side screen to be a snug fit.
