How to set up ssl.verification_mode=none just like in filebeat

[tony9527167]

The filebeat supports disable SSL verification with configuration

output.elasticsearch:
  hosts: ["https://localhost:9200"]
  username: "elastic"
  password: "elastic"
  ssl.verification_mode: "none"

How to set it up in kafka-connect-elasticsearch?

name=elasticsearch-sink
connector.class=io.confluent.connect.elasticsearch.ElasticsearchSinkConnector
tasks.max=1
topics=test-elasticsearch-sink
key.ignore=true
connection.url=https://localhost:9200
connection.username=elastic
connection.password=elastic
type.name=kafka-connect

# no option likes ssl.verification_mode?

I can't find any useful tips from https://docs.confluent.io/kafka-connectors/elasticsearch/current/configuration_options.html#security

See also #843