I use unRAID to manage my datasets at home and constantly need to move files around. MC is definitely the easiest to work with with unRAID however it is very annoying to have to navigate through to your directories every time you launch the app.
I couldn’t find an option to set this in the options so added this to my bash_profile instead. A bit hackish but works perfectly.
nano /root/.bash_profile alias mc="/usr/bin/mc /mnt/user/YOURLEFTPANELDIRECTORY /mnt/user/YOURRIGHTPANELDIRECTORY"
Save this then log out of your SSH session and back in 🙂