Rechecking my Haynes manual, it calls the cable end adjustment at the pedal the 'idle speed end stop adjuster', and the one at the throttle linkage on the engine the 'full throttle stop adjuster'.

It says the full throttle adjusment is made so with accelerator fully depressed, the throttle is at its wide-open stop. The idle adustment at the pedal end just takes out any slack when the pedal is released - at idle.

It also mentions first popping out the connecting lever ball - the lever that connects the upper linkage down to the throttle. This connecting lever is adjustable. Adjust it so its socket lines up with the mating ball with the linkage moved back in contact with the idle stop. Then reattach.

Steve