Advanced Options: Clear temp files in non-standard directory?

Do to disc space/partition size limitations, I had to change the Webmin Advanced Options > Temporary Files directory to a location with enough space to run backups.

Directly below the setting for "Temporary files directory" is a checkbox for a setting called "Clear temp files in non-standard directory?"

Am I correct in assuming that since I changed the location of the webmin temp files directory, that I must ALSO select the "Clear temp files in non-standard directory?" checkbox in order for webmin background tasks to clean out any temp files it creates in this custom set "Temp files directory"?