Using female-to-female jumper wires instead of a jumper

For powering the jetson I want to use the barrel jack and don’t have a jumper am I able to use a female to female jumper wire instead?

If your female jumper wire fits on the two pins, and you can connect the two pins (i.e. the wire runs from one to the other, then yes. All the jumper does is create an electrical connection between the two pins on the Nano. You could even use solder to (somewhat) permanently join them (might not be advisable as I am not sure what the pins connect to and what heat tolerance the other end has.

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