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.
CAN Port
The CAN port is a JST-XH header located here:
DFU Mode
To put the Spider King into DFU mode, first power off the board. Then make sure there is no jumper on the USB-5V header.
Place jumper on the BT0 and 3V3 pins. Then power on the board.