this is for those who want the Filament in its own box to keep it dry and free of dust, above the Printer on its own shelf.
I have use a m3 screw white a nut inside the Mounting.
100% fill, 1.75mm PETG Black
and if you want one with the possibility of attaching like the original, this one is for you: https://www.printables.com/model/339816-filament-run-out-sensor-mounting-ender3-s1-v2
The author marked this model as their own original creation.