Servo Cable
WARNING: This page is about a different car, the 2007 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The speed control servo cable is connected between the speed control vacuum servo diaphragm and the throttle body control linkage. This cable is used only with 3.7L/4.7L engines.
A speed control servo cable is not used if equipped with a 5.7L engine.