1980 gmc heater control cable location

[1972BackInBlackC10]

i recently had my heater control and radio out of my truck after i reinstalled the my upper arm on my heater control wouldnt move, so of course like an idiot i tried to force it and it broke

i found the cable that wasnt moving thinking it was seized and needed replacing i removed it, after removing it i find that it isnt seized up i check the other two cables to make sure i didnt remove the wrong one and the both move freely

im thinking i either had the cable in the wrong locations and it wouldnt move or it was kinked some how possibly even a combination of both, i looked on here and couldnt find anything on this for a non ac truck, maybe i didnt look hard enough? can anyone tell me what cable goes where on my heater box or provide me with a link to someone who has done this