When the photos of this part very carefully look at and pay attention to this issue, we see that the circles are decoration only front and the lens cap offers no point. I had assumed that you can sit on the existing lens cap to protect the sun visor of course, it was natural for me. This is not possible. So you have either the lens hood or lens cap on the camera. With GeLi the lens against contact is protected (except directly from the front, of course), but the protection is not "tight". If you want to protect the lens when transporting dust-safe, the GeLi must come down and the lens cover on it. The GeLi then lies somewhere in the jacket / camera bag. Stupid made.
I just wonder when the first accessory provider comes up with the idea to offer a rubber cover, which can be outside it plugged into the lens hood. That in itself would be a good solution, but will cost 10 euros extra determined again :-(