Set the cable so that when the throttle is wide open the cable is fully extended.
The easiest way to adjust the cable is with 2 people. One inside the veh with their foot on the gas, all of the way down. The other person releases the cable adjustmnent, and locks it when the gas pedal is at the floor. Trying to adjust it by yourself under the hood may give you an improper adjustment as far as kick-down is concerned. This is because many times the gas pedal does not actually push the linkage as far open as you can by hand. It will only take a few seconds that way.