Throttle kickdown!!!!!!!

Can someone please illustrate the proper method for adjusting a the throttle kickdown for a 727. I was having a issue with the tranny holding 2nd gear longer than it should be. So, I called a transmission shop and the guy told me that the throttle kickdown does something with the pressure in the tranny. So, if anybody could draw a diagram from the carb down to the tranny that would be great.

Brandon