Allow Insecure Connections for Testing

Hey, thanks, anyway I think that you don't really need special field for this, because it is easy forgot about this when you do export site configuration.

You could use hook_elasticsearch_connector_load_library_options_alter to make necessay change, like this:

function example_module_elasticsearch_connector_load_library_options_alter(&$options, &$context) {
  $site_env = \Drupal\Core\Site\Settings::get('site_env');
  if ($site_env == 'local') {
    // Skip SSL certificate verification.
    $options['curl'][CURLOPT_SSL_VERIFYPEER] = FALSE;
    $options['curl'][CURLOPT_SSL_VERIFYHOST] = FALSE;
  }
}

You could control site_env setting via settings.local.php, like:

$settings['site_env'] = 'local';

I have tested this solution with a real ElasticSearch cluster running on AWS.

I think it would be nice to add the code snippet on elasticsearch_connector.api.php on relevant hook with some description.