FileStorage Settings for config.storage.active in Drupal 8?

Would anyone know the correct settings for config.storage.active when pointing to FileStorage?

According to the Active configuration settings section of settings.php:

"/**
* Active configuration settings.
*
* By default, the active configuration is stored in the database in the
* {config} table. To use a different storage mechanism for the active
* configuration, do the following prior to installing:
* - Override the 'bootstrap_config_storage' setting here. It must be set to a
* callable that returns an object that implements
* \Drupal\Core\Config\StorageInterface.
* - Override the service definition 'config.storage.active'. Put this
* override in a services.yml file in the same directory as settings.php
* (definitions in this file will override service definition defaults).
*/"

In effort to find the correct settings for config.storage.active, I did a global search of the project and found this in core.services.yml (drupal-8.0.0-beta2):

config.storage.active:
class: Drupal\Core\Config\DatabaseStorage
arguments: ['@database', 'config']
public: false
tags:
- { name: backend_overridable }

So If wanted to instead use FileStorage would my settings look like this in services.yml:

config.storage.active:
class: Drupal\Core\Config\FileStorage
arguments: ['@file', 'config']
public: false
tags:
- { name: what_tag_should_I_put_here_? }

Thanks & Regards,
Tom