this plugs directly onto the skr to provide CAN bus functionallity via rx/tx pins.

Raspberry — usb —> Skr Pico — RX/TX —> SN65HVD230 —CAN L/H —> EBB36

see this for how to flash https://canbus.esoterical.online/mainboard_flashing/common_hardware/BigTreeTech%20SKR%20Pico/README.html 

BUT take the 3.3V pins just left of the mount instead of 5V

Its made for this one

and should look like this  THIN side to the pcb