Clockwise is richer, counterclockwise is leaner. First you have to find and fix your vacuum leaks or you are wasting your time. Unless you can hear a vacuum leak from the hoses buried at the throttle body don't worry about them for now. The large idle air hoses looked suspect in your pictures and the injector seals and supplementary air hoses that connect to the fuel injector holders also tend to get hard and cracked. Diagnose and repair the leaks and report back.