2005 Nissan Maxima radio wiring?

I'm installing a line out into my factory radio so I can use my stock radio for my amplifier and sub. I have my subwoofer and amp installed already. The wiring diagrams I came across are very confusing and inaccurate. And I do not know from which set of wire behind the head unit is actually the set I should be looking through them for. A photograph would definitely help also with which is the REAR speakers positive and negative and also where I should connect my radio signal to as well. Also heard I could directly connect them to the rear speakers them self... How would that would? And which would work best? Thank you.Anthony D.

Radio 12V     yellow     +     radio, white 10 pin plug, pin 6 Radio Ground     (chassis) Radio Ignition     purple     +     radio, white 10 pin plug, pin 10 Radio Illumination     RED / blue (parking lights), RED / yellow (dimmer)     +,-     radio, white 10 pin plug, pins 8 and 7 Factory Amp Turn-on     GREEN / WHITE     +     radio, white 6 pin plug, pin 2 Power Antenna     GREEN / WHITE     +     radio, white 10 pin plug, pin 5 Left Front Speaker (+/-)     white - black     +,-     radio, white 10 pin plug, pins 2 and 1 Right Front Speaker (+/-)     yellow - brown     +,-     radio, white 10 pin plug, pins 4 and 3 Left Rear Speaker (+/-)     GREEN/ YELLOW - BLACK / YELLOW or brown - BLACK/ red     +,-     radio, white 6 pin plug, pins 4 and 3 Right Rear Speaker (+/-)     blue - red or blue - BLACK/ white     +,-     radio, white 6 pin plug, pins 6 and 5 Center Channel (+/-)     N/A Subwoofer (+/-)     (sub amp uses left rear and right rear for input) Gary Sather

Thanks for the wiring diagram. I ended up looking over everything again and began to understand where I went wrong. Fortunately I can now I have a better understanding about wiring for stereos. Using an aftermarket stereo would've been MUCH simpler. But having the factory stereo is the way to go. Anthony D.