Need ElasticSearch Connector settings example


I am unfamiliar with how to query data in ElasticSearch. I was recently walked through some of the Elastic UI and learned about filters and lenses, but this information doesn't seem relevant to the fields of the connector. Attaching a screenshot here of the required fields for the ElasticSearch Connector. Would anyone be able to show me an example of what to enter in these fields, or point me in a direction of how I can learn more about querying data this way in Elastic?