Actually since their permanent non-removable drives, I would say wherever you want to place them, if they’re meant primarily for storing user-based data you can do like what I used to do which was store them in within the home directory just as specific names. Like my old setup before I went proxmox was /backups was my backup drive, /home was my home drive that stored most of my users /home/steam held all my game server drive and /home/storage held my long term cold storage drive.
wow imagine that, the walled garden stalling something that breaches it’s walls. Who woulda thought this outcome would happen.