Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4859322.
This is a button mount that can be attached to the X-axis wheel plate of the Voxelab Aquila. I'm not sure if it will work on the Ender 3 V2, but it might since they're basically the same printer.
This will mount with the stock chassis bolts. Just unscrew the wheel plate bolt, and re-install with the mount.
I used Cura's timelapse plugin to move the print head to the button after each layer. The button triggered for me at 217.5mm but your set up may be different than this. I'd start at around 180 on the x axis and move it over in small increments until you find the right distance.
I used this shutter cable to hook up to my Canon DSLR. Your camera might have a different connector.
Also used these tactile buttons
Here's a short video of it in action: https://imgur.com/gallery/d8k8ZoL Here's the full install video: https://youtu.be/sV5vKwD4lFE