TKL container with multiple disks

Hi everyone, I am using the Nextcloud LXC container (TurnKey Linux) on my Proxmox setup, and I am experimenting with adding additional network disks. Everything is set up and working nicely, but how do I tell Nextcloud to use the loop1 disk for data instead of loop0? The loop0 disk is a standard local hard drive, and the loop1 disk is an SMB/CIFS network share.