Generally to setup path for Config Directories,it is defined under
$config_directories['sync'] = 'path/to/config';
but in a blt setup when I checked
I see there is no definition of
whereas in the documentation it says its defined here under vcs
Although, by default, Drupal 8 uses the sync configuration directory type for configuration, Acquia Cloud uses the vcs configuration directory type for that purpose. https://docs.acquia.com/acquia-cloud/develop/config-d8/#cloud-manage-local-config
But I still can't find the place where it is defined?