connecting a/c and heater wiring using painless w. harness / 1976 GMC 25 4x4

I am having trouble with my a/c heater circuit and need to know what wires go where after installing a painless wiring harness and not having the original wiring harness to truck!! This is the only circuit I am having a bit of a problem with! Thanks for any help that can be provided. Anthony
 

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