Designed a filament runout sensor mount for this kind of filament sensor: https://down-ph.img.susercontent.com/file/0936f2f013de363f3bcbdeba97100861.webp
Using this bowden mount : https://www.printables.com/model/602032-ender-3-v3-se-ender-3-se-reverse-bowden-adapter
Printed this with the included photo of orientation at .2 layer height with 2-3 walls 70% infill.
i used 2pcs m3x12(m3x10 might work as long as its longer than the stock one) screw (non countersunk) to mount to the cable clamp screw hole
2 m3x18 for the filament sensor, can screw directly to plastic, but use nuts if you must (might need to drill out the holes a bit bigger, designed it to be smaller for the screws to bite on it)
The author marked this model as their own original creation.