To ensure you are ordering the correct wiring harness please be sure to determine if you have the cutout or regulator. It is a common and costly mistake as wiring harnesses are not returnable once they have been installed.
Cutout = 3 terminals
Regulator = 4 terminals
If the control box is mounted on top of the generator it should be a cutout. From the factory regulators were never mounted on top of the generator.