Hi,

Please add to:
https://docs.opsmanager.mongodb.com/current/reference/api/automation-config/#ssl

a description of the field clientCertificateMode (that can be set to OPTIONAL to allow connections without certificates or REQUIRE to require SSL client certificates.

Example:

{
  cluster: {
...
        "ssl": {
            "CAFilePath": "/opt/mongodb/pki/ca.crt",
            "clientCertificateMode": "OPTIONAL"
        },
...
  }
}