Please clarify what kind of wiring issue you are trying to resolve.
Have you checked out some of the various diagrams for a match.
Just because the machine was purchased in 2005, does not mean it was built then. Many machines will sit in and inventory for a couple of years before being sold. That is common for Farm and lawn and garden equipment,
Also, that is why product identification labels are used, so the actual year of manufacture is not disclosed.