rear speaker wires

[mickeyfish]

cut a long story short,,,,,,bought new h/u,,,,damaged,,,back to shop,,,,,refund. sticking with Toyota oem stereo, 58806. will keep it for now. question is, are there any wires in loom for rear speakers, if so, where can I locate them. I have seen the odd diagram, but it does not show where or if there are wires tucked away somewhere. not keen on tearing car apart to find them if they aint there.  some advice would be great.