72 Challenger wiring problems

Hi all, would appreciate some help sorting some wiring issues. Has anyone ever noticed the diagrams for the 72 and 73 Challenger are slightly different:
http://www.mymopar.com/downloads/1972/72ChallengerB.JPG
http://www.mymopar.com/downloads/1973/73ChallengerA.JPG

Specifically pins 12 and 24 seem to be swapped between the years (horn and low brake warning). The problem I am having is the M&H replacement harnesses are the same for both years and appear to be for the 73...

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Author: WhiskeyRebel