pool migration

I come from Freenas and had a lot of data on a ZFS pool I created (2 x 8 TB disk) and now I migrated to Proxmox, when I did zpool import it all went without error and the pool showed up under Server > Disks > ZFS. But I noticed that it didn't appear in the left collom where all my other storage...

I need some advice on how to complete this task. I have two a two server cluster: Server A and Server B. Server A is getting a little old and requires some hardware/firmware maintenance, so I need to take it offline for an unknown amount of time. Server A currently has an old ZFS pool of...