It is a "plug-and-play" device, with one end plugging into the car's existing wiring harness and the other into the new stereo.
The wires are color-coded and often labeled to indicate their function, such as power, ground, and speaker connections.
This type of harness is designed to simplify the installation of a new car stereo and prevent damage to the vehicle's original wiring.
There are different wiring harnesses available for various car makes and models.
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