On the interactive map linked at https://www.fife.gov.uk/kb/docs/articles/community-life2/parks,-allotments,-core-paths/outdoor-access/core-paths-and-cycle-routes-network/core-paths-plan-interactive-map it says it's still to be developed. I also saw this route when I first started editing, but it was impassable to go west to the parking (downhill through thick gorse), shame as it would be a useful off-road connection.