The engine harness was from a '70 1.7L D-Jet, the main car harness is from a '74 2.0L D-Jet car.
On early cars, the power for the heater blower was routed through the relay board. Green wire going from Pin 11 to the blower motor.
On later cars, the power for the heater blower comes out of the main harness under the relay board. (Still a green wire)
So, by using a '74 main car harness, the green wire in my engine harness was obsolete, so i disconnected it at the plug.
Andy