Serial Device Path for ZHA?

I recently re-installed HA in a Proxmox VM and am trying to reconnect ZHA. On the previous installation I had the dongle and ZHA running great. Now when I’m setting it up again it’s asking for the device path. Where do I get that?

Could I have lost the dongle connection during the reinstall?

Did you ‘pass-through’ the dongle from proxmox to the VM ?

Oh, and you need to restart the VM after adding the USB-device

Very cool! I forgot about that.
Thanks very much!