Check with a Kubota service department. Most equipment manufacturers have kits with electrical connectors parts for replacing connectors in wiring harnesses when there is troubles. That way if the pins or plastic housing breaks, it can be repaired without replacing the whole harness. I have in the past obtained the parts to fix electrical connectors on equipment of other brands (John Deere AG and Construction, Claas, Case/IH). These repair parts are not listed in the parts diagrams for a particular tractor model. They would be located in a more general listing of parts and repair items that fit many models, sort of a generic "Fits All". You would have to have access to Kubota's parts to find these types of things not something you would find on the public parts website. A good parts man would know how to find them. Nowadays, finding a good parts man or woman is hard. If the computer doesn't show it in a couple seconds then it's not there. I hope you can find someone to help you because you should be able to find what you need.