“Junk” vs. “Spam”

It seems to me there is a discrepancy between the suggested spam destinations in Virtualmin Configuration ($HOME/mail/Junk, $HOME/Maildir/.Junk/) and Server Configuration (~/mail/spam, ~/Maildir/.spam/).

Furthermore, help for Virtualmin Configuration mistakenly claims that the name of the folders is “Spam.”

Am I right in assuming that the only way to set the spam destination for an existing virtual server to ~/Maildir/.Junk/ is to use the “Write to mail file under home directory” option?