Look for the printer-twotrees-sapphire-pro-2019.cfg (or updated versions) on the official Klipper GitHub.
There is no single "official" cloud link for the Sapphire Pro as Two Trees often directs users to their Wiki for general upgrade instructions. Instead, the community relies on these highly-regarded repositories: two trees sapphire pro firmware link
The TwoTrees Sapphire Pro (SP-3) remains a beloved CoreXY 3D printer due to its linear rails and sturdy frame. However, its stock firmware often leaves users wanting more control, better thermal management, and modern features like auto-bed leveling. Look for the printer-twotrees-sapphire-pro-2019