OctoPrint firmware update SKR v1.3 direct connect

I'm trying to find out if it's possible to use the firmware update plugin to update the SKR v1.3 firmware over internal tx/rx connections instead of USB?

What did you already try to solve it?
I have install USBMount and configured according to the directions, but it does not appear to mount the SD card on the pi under /media/usb.

octoprint.log (174.9 KB) serial.log (25.1 KB)

Additional information about your setup
OctoPrint Version 1.3.12
OctoPi Version 0.17.0
SKR v1.3 board running Marlin 2.0 firmware
Creality Ender 5 Pro

Did you restart everything with the sd card inserted?
Also this might help you

And here the complete guide