This maybe of help to those who need to know the wiring details:
The following information was extracted from this thread on the Oz forum:
http://www.nissansilvia.com/forums/index.php?showtopic=77345&hl=head++unit++install
Power:
Black/red stripe = Constant 12V (for memory - which is usually the yellow on a wire harness)
White/black stripe = Ground (connects to black wire on a harness)
The antenna is also Ground as well and necessary to get a circuit.
Orange = 12V (turns on only when you start ignition - connects to red wire on a wire harness)
Blue/red stripe = Illumination (attaches to lights being switched on - usually attached to a blue wire on a after market harness)
Speakers:
Brown = front right (+)
Brown/grey stripe = front right (-)
Blue/white stripe = front left (+)
Blue/orange stripe = front left (-)
Blue = rear right (+)
Red = rear right (-)
White = rear left (+)
Black = rear left (-)