1. Throttle Cable (To Gas Pedal)
2. Cable "Free Play"
3. Lock Nut (Loosen to Adjust)
4. Adjust Nut
The other cable on the left is the Kick Down Linkage to the Transmission. This also has a Lock nut, and an Adjust nut. This, along with the adjustment on the floor, below the Gas Pedal is what restricts the throttle plate to open 100%.