[. . . ] 10 - Installation using the screw holes on the side of the unit Installing the Voice Guidance Speaker . This unit is for vehicles with a 12-volt battery and negative grounding. [. . . ] If this is not done, the vehicle battery may be drained when you are away from the vehicle for several hours. Cords for this product and those for other products may be different colors even if they have the same function. When connecting this product to another product, refer to the supplied Installation manuals of both products and connect cords that have the same function. Yellow To terminal always supplied with power regardless of ignition switch position. This lead must be connected to the power supply side of the parking brake switch. Optical cable (supplied with the MultiChannel AV Master Unit) Green IP-BUS cable (supplied with the Multi-Channel AV Master Unit) Connection box (supplied with the DVD Navigation Unit) Green DVD Navigation Unit (e. To audio inputs of car stereo To audio outputs Connection box (supplied with the DVD Navigation Unit) RCA cable (sold separately) DVD Navigation Unit (e. Before finally installing the unit, connect the wiring temporarily, making sure it is all connected up properly, and the unit and the system work properly. â· Use only the parts included with the unit to ensure proper installation. â· Consult with your nearest dealer if installation requires the drilling of holes or other modifications of the vehicle. [. . . ] Do not install on the dashboard where it may be subjected to direct sunlight. Stick the supplied velcro tape to the back of both the voice guidance speaker and the center console, and attach them. [. . . ]