How does the GMC headlight wire run to high beam lamp?

[Gregski]

trying to piece together a '71 GMC four eye basket case and I can't seem to figure out how to get the high beam (two prong plug) black and green wires over from the outside lamp to the two on the inside. None of the holes/nooks and cranies seem to be big enough for it to pass through. Can someone please show me a pick how to run this harness over from the two outside lamps to the two inside lamps. tried searching the forum but came up short, my pic below don't seem right