The reconnecting by naming the same as seen in truenas also worked for me. It didn't want to the first time trying to set up with private access, but tried again with defaults and it worked. If anyone is wondering, I did "unclaim" my old server, and just named everything the same again.
Had to restore after both my boot drives died ... I don't recommend "Orico" SSD's 😭. Learned my "you get what you pay for" lesson again and now have a WD boot drive redundant with some crappy old spinning rust from a old laptop that I'll replace at some point.