Mounting piece for the end stop that goes with this model:
https://www.printables.com/model/301695-ender-3-s1-y-axis-silent-stepper-motor-mount
I used these end stops from Amazon
https://www.amazon.com/dp/B0BR7P8V2B?psc=1&ref=ppx_yo2ov_dt_b_product_details
Two m2x4mm screws are required.
The author marked this model as their own original creation.