I've had the throttle body off of my 5.0 2000 Mountaineer. I don't recall exactly how the cable comes off, but once you remove the one screw that holds the plastic cover over the cables, it was easy to see how to remove it. As I recall there is no "prying" involved. If it wasn't 16 degrees outside with 30 MPH wind gusts I'd go and remove my cover and look.
If it's the kind with the metal end, you just open the throttle by hand and pull the cable until the cable lines up with the slot.