120 ohm Termination Resistor
There is a permanent 120 ohm termination resistor soldered to the board, no need to add a jumper to enable it and also no ability to disable it.
DFU Mode
To put the Monster8 into DFU mode, hold the BOOT0 button and while still holding press and release the RESET button. Then count to 5 and release the BOOT0 button.
Katapult Config
Klipper USB-CAN-Bridge Config
NOTE ON ENABLING CAN
Make sure to have the CAN select jumper installed. The two jumpers should be on the LEFT and MIDDLE pins.