[. . . ] Consult your dealer if installation requires drilling of holes or other modifications to the vehicle. [. . . ] 12 ISO connector In some vehicles, the ISO connector may be divided into two. 13 Speaker leads White: Front left White/black: Front left Gray: Front right Gray/black: Front right Green: Rear left Green/black: Rear left Violet: Rear right Violet/black: Rear right 26 Perform these connections when using the optional amplifier. Use of this unit in conditions other than the following could result in fire or malfunction. To prevent a short-circuit, overheating or malfunction, be sure to follow the directions below. Wrap adhesive tape around wiring that comes into contact with metal parts to protect the wiring. -- Place all cables away from moving parts, such as the gear shift and seat rails. -- Place all cables away from hot places, such as near the heater outlet. -- Do not connect the yellow cable to the battery by passing it through the hole to the engine compartment. [. . . ] 19 To Rear output 20 Connect with RCA cables (sold separately) 21 Power amp (sold separately) 22 System remote control 23 Left 24 Right 25 Rear speaker 26 Perform these connections when using the optional amplifier. [. . . ]