Currently, the only entrypoint in the documentation for both of these methods is in https://docs.mongodb.com/manual/reference/config-database/#config.settings

Even though both methods simply change a document in the config.settings namespace, it would be interesting to be able to see these two methods in the sharding methods page (https://docs.mongodb.com/manual/reference/method/js-sharding/), and point back to the config.settings documentation.