Holley Double Pumper Question(s)

Your missing the rear set screw.
Is there a decent parts diagram that can identify that rear set screw? I don’t know where or what screw that is.

Also the idle set screw doesn’t engage and there must be a reason. It is like it’s 3/8 too short but I know that it’s not. Does the carb need something to bring the idel set point farther up or something?