Summary

Flexible camera mount onto dual rails.
Ears on the camera case are fore metal mounted lamps, for they are heating badly.
I've replaced the original lens for one from quadcopter camera. It's 140deg FOV, so the cone is for ~140deg.

Another brilliant is to replace the awful lens to tome decent M12 one, like one of these https://aliexpress.ru/item/1005001928526482.html considering FOV angle of your preference.
Takes an adapter like this one https://aliexpress.ru/item/32845755823.html