wiring rear doors on vz

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ok im currently running wires for my speaks into my boot ready for the amp etc.

i am up to the rear doors and i have no idea how im goin to get the speaker wire throught the rubber boot that goes from the door to the car.. (its worse than the front)

if i did manage to get it through it look like the wires run into the frame on the door pillar so i cant even see how i will get to the wires once through the rubber boot.

anyone done this??
help appreciated!