[slief]

It also looks like it's a bit too high in the cup. It looks like the activation point on that switch is right around the top of the neck which can cause it to not activate. It's hard to tell though. You might consider a Madison sub micro M3326-NO float switch. I would suggest a normally open one that closes on rise one that way, when you remove your lid and switch for cleaning, it doesn't shut the skimmer down. .
https://www.amazon.com/Madison-M3326.../dp/B0090918GW

Or get this universal float skimmer float switch kit that can be rotated so that the barrel of the float is further away from the side of the cup. You can raise it or lower it to adjust the height and rotate it to move the float closer or further from the side of the cup. It's designed to avoid that issue you are having and includes the Madison float switch.

https://aquadriverusa.com/products/u...ashdown-models