Basically it is quite simple.
The basis for any new config is always the reference pin / function assignment of your new board:
- SKR-3/Hardware (SKR 3 EZ)/BIGTREETECH SKR 3 EZ V1.0-PIN.pdf at master · bigtreetech/SKR-3 · GitHub
- SKR-3/Firmware/Klipper/generic-bigtreetech-skr-3.cfg at master · bigtreetech/SKR-3 · GitHub
To reflect the requirements of your special printer, consult the example for this printer and copy over:
[printer]sectionposition_endstopposition_max/position_max- sensor definitions
Thats about all to do.