BL touch was most awaited upgrade i have done to my 3d printer. Thanks to Thinkrobotics for shipping it.
Procedure to install BL touch sensor gets more complicated as you browse more, so here i am pasting best tutorial which worked for me .
Complete guide by
SMITH3D here: https://www.smith3d.com/ender-3-v2-bltouch-firmware-installation-guide-by-smith3d-com/
i will suggest you to go through this page once. He has explained every smallpart in detail.
BL touch mount : https://www.thingiverse.com/thing:4462870 ( print this part before dissambling printer)
Download professional firmware : https://github.com/mriscoc/Ender3V2S1/releases/download/20221002/Ender3V2-422-BLT-20221002.bin ( for board version 4.2.2 )
https://github.com/Jyers/Marlin/releases/download/v2.0.1/E3V2-BLTouch-5x5-HS-v4.2.7-v2.0.1.bin ( for board version 4.2.7 )
Here are my installation images.