FIRST, my deepest sympathies for your loss. And Huntsville is a great town, but I prefer Athens just West of you (I lived and worked and played in Alabama for 24 years, B’ham and Anniston areas).
If I were in your position, needing a sound system hooked up, I’d call the AV department at U of A Huntsville and ask for help. OR ... make a drawing of everything, every socket, every color, every lettering on the panel where the wires would be plugged in, then take THAT to the nearest Radio Shack and ask them based upon the wires and plugs and colors of panel and speakers what should go where.
Thanks for the suggestion. I hope I can type correctly through my tears. I had never thought of UAH. The son of a friend could do that, too.