I’m writing a note to myself as I don’t have a UPS yet 🙂
The Port value can be set to “auto” as metionned here: http://jonathanbrown.me/my-freenas-project-part-5-the-config
Found another rerefence that confirms this:
– For newhidups: “auto” or whatever value as newhidups automagically probe for USB UPS.
SOURCE: http://people.freebsd.org/~thierry/nut_FreeBSD_HowTo.txt