Lowes took me

I have a 2023 AXIS 500 need some help locating diagnostics port. Don’t have any problems with the machine at this time just trying to familiarize myself for the eventual repair work. I found a Delphi Connector inside next to passenger seat tried it but couldn’t connect and then found an unknown connector type that is black outside red inside with rubber cap under hood on firewall. Does anyone know this connectors name or is this not the port I need. Thanks Mike