Well, on my set of bars, there is a pylon swaged into the bar that accepts the lever clamp screw. The pylon is at least 1/2" proud of the bar. The covers need to be worked over these pylons when removing or installing.
Actually, I crashed a couple of years ago and knocked off one of the pylons. I was able to snake a conventional lever clamp around the bar after enlarging the hole in the cover for the pylon, i.e. without removing the cover.