Are you looking for a 4th small harness connector plug in your vehicle?
This is a common question we get when you are installing the module back in the vehicle.
Good news is that the connector is not missing. This connector is used for factory use only at assembly line. This is a dummy plug that covers that terminal. That is why you cannot find a wire harness connector that plugs into it.
If you are missing this connector, not a problem:
This connector is usually seen on Japan made vehicles: JDM Japanese Domestic Market vehicles: Acura/Honda, Infiniti, Lexus, Mazda, Mitsubishi, Nissan, Subaru, Scion, Toyota.