Non DSP speaker wiring colours
 

Hi guys
i have been stuck on this part of my install for a few hours now and getting very annoyed, my car is a e53 4.4 with sat nav but no dsp, the front speaker wires are blue/white and blue/brown, but i am looking for these wires in the back of the car and cant find them anywere,

i intend to use the same wires to connect to an aftermarket amp and aftermarket door comps.

anyone know if the front door wires change colour along their route to the boot?