Some car models comes with “electrical current sensor” connected at the negative terminal on the battery in a place that may not be visible. For details check with your dealer or if unsure connect the earth to the same place on the body. The installation position and the shape of the electrical current sensor may be different before and after minor model changes; please consult your car dealer for details.
Notice: Make sure the cable connected is not bended when install to alternator (+) positive & battery.