Small remix of https://www.thingiverse.com/thing:4540528
I have fan duct mounted on lower bolt, so can't use that with that bltouch mount, so I cut it off.
Two bolts from X-endstop switch is enough to hold BLTouch securely.

Update:

I attached photo of my connection of BLTouch to the stock Mega Zero board.

Firmware: https://github.com/kad/Marlin/releases

anycubic_mega_zero_bl_a2-firmware.hex. - for wiring like mine, using EXT-A2.anycubic_mega_zero_bl_zmin-firmware.hex - using z-min stop connector.

Flashing instructions on wiki: https://github.com/kad/Marlin/wiki