dislocker /etc/fstab Mount

UUID=$UUID_OF_DISK /mnt/crypt/8TBCrypt fuse.dislocker user-password=$PASSWORD,nofail 0 0
/mnt/crypt/8TBCrypt/dislocker-file /mnt/8TB auto loop,nofail 0 0

Note: There’s some obvious insecurity in statically assigning the password in your fstab file. This should only be used temporarily if you’re converting between a bitlocker -> ext4 or LUKS type disk.