That port would only be an output expecting a monitor…the inverse of what is needed.
There are basically two ways to use the Jetson without a monitor. The first is over the ethernet via ssh. If you know the address of the Jetson (such as from a router), then it is simple to ssh in from any other computer on that local network. The second method is by serial console.
Serial console is just a text terminal where most of the software runs on some other host. This is valuable for any kind of development because almost nothing has to exist for this to work. Networks, video displays, so on…tend to require drivers. A serial console is almost without a driver. This isn’t quite as nice as ssh, and it requires the correct cable, but is very valuable for development. See these for serial console options: