Throttle cable adjustment...
 

After I got my see-through engine door, I've discovered a few things that make me go 'hum'. One issue is that the throttle cable doesn't pull the throttle all the way when the pedal is floored -- it's still possible to pull the throttle a bit further with my fingers. I wonder if this is due to an old stretched out cable? I checked my Bentley shop manual, but I couldn't find how to adjust this cable. Any help & suggestions appreciated.

- peer