Just to follow up with one more though ... adding a plugin to your Moodle will have to be performed with a process to fit hosting requirements of those 2 symlinks being in every subdirectory.
Process would be unique to your setup and if coming back to forums for issues in installing plugins, please disclose your set up.
The other item mentioned the link that described how to accomplish this feat, said: "file quota limit AND a disk space quota limit" issues followed later.
Affects not only install of a plugin, but could affect your ability to backup code directory if plugin installed is 'heavy' (lots of folders and files).
Document what those limits are. Affects course backups and full site backups.
Sure hope the quality of the hosting service after all this is out of sight, for your sake!