Greetings,,,
These two parts are needed, from the V2 bom:
649-65474-002LF|1
538-22-03-2021|1
One is the jumper, one the 2 pin connector. You need 1 of each. Plugging the numbers into Mouser will let you see them.
It's a simple jumper, so no specific orientation needed.
The V1 firmware works without it, if you don't choose to use it, or need to wait to obtain the 2 parts.
Keith