Thanks to Philippe AUGAT for promoting our common project.
https://www.linkedin.com/posts/philippe-augat-a40b9b191_cr%C3%A9ation-r%C3%A9alisation-et-pose-de-quatre-r%C3%A9ceptacles-activity-6573168009215565824-vQzl
The glasses visible on the photos and supplied by Verre Industrie are tempered laminated glasses to close the new projector pits.