[. . . ] Be sure to ground this unit to the car's chassis again after installation. [. . . ] If you have any questions or require information regarding installation kits, consult your JVC IN-CAR ENTERTAINMENT dealer or a company supplying kits. (×1) *1 Four of these screws are fitted to the main unit when shipped. (B) Installing with the mounting brackets from the car / Installation avec les supports de montage de la voiture / Instalación con los soportes de montaje desde el automóvil Audio system originally installed in the car / Système audio installé à l'origine dans la voiture / Sistema de audio instalado originalmente en el vehículo Firmly attach the ground wire to the metallic body of the car using the screw originally fixed to the metallic body of the car. *2 Firmly attach the ground wire to the metallic body or to the chassis of the car--to the place uncoated with paint. DO NOT connect the speaker leads of the power cord to the car battery; otherwise, the unit will be seriously damaged. BEFORE connecting the speaker leads of the power cord to the speakers, check the speaker wiring in your car. [. . . ] BEFORE connecting the speaker leads of the power cord to the speakers, check the speaker wiring in your car. [. . . ]