compile the klipper firmware, making the changes to the config as needed first: https://www.klipper3d.org/Installation.html#building-and-flashing-the-micro-controller
run the nano convert python script in the script folder on the generated bin file; rename to Robin_nano_v3.bin
put it on a fat32 16gb uSD card and put it into the MKS baord and boot it up; give it 15 minutes
check the uSD content's after; the bin should be renamed to .cur, otherwise it didn't work.
If it did't work download source for openocd; build/install