Migrate & Point /var/lib/casaos/files to /DATA but on zfs mirror pool (2 ssd's via Y-cable)

I have tried to follow this guide Maximizing ZimaBoard Potential & A Comprehensive Guide to ZFS Installation by Tyrehl | ZimaBoard which would seemingly work if I was simply a single volume, but I’m not sure if entering a new line in /etc/fstab as follows would work -

UUID=<ZFS_pool_UUID> /DATA zfs defaults 0 0

THis is what I currently have