Where are the "local files" for the Localization Update module stored? I'm using the Localization Update module in Drupal 7.  As the "update source", I can choose "Local files and remote server".  I'd like to add some .po files that I created locally; where do I place them so that l10n_update can pick them up?

I don't see any options on the module's configuration page (/admin/config/regional/language/update).
On the bottom of the module's configuration page you have to set a path for the local files.


  Store downloaded files A path relative to the Drupal installation directory where translation files will be stored, e.g.
  sites/all/translations. Saved translation files can be reused by other
  installations. If left empty the downloaded translation will not be
  saved.