Throttle cable

Have had problems with throttle cable caught a couple of times pedal to the floor and nothing adjusted the cable under the floor where it seemed to be slipping through the holding bolt, today caught out again lucky I had a string line in the boot so did the thru the window trick.My question is where the cable rolls over the triangular section and through the bolt with the hole in it, what secures the cable in position does it rely on the bolt being tightened to me this is not the answer.On most cables there is a stopper on the end of the cable mine had none and according to parts book it doesnt show one either,have included some pics of the arm the cable rolls over any thoughts.
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Thanks Greg,have just realised why there is no imput into this thread,left hand drive cars have a different set up to right hand drive cars,LHD have a moore superior set up than RHD the later relying on inserting the cable through a hole in a bolt and then tightens up so the cable squashes up against the bizzo the cable rolls over (picture).I decided to try an alternative method puting the cable through the bolt hole then looping the cable over the bolt and swaging works fine,I have enclosed a couple of pics, 1 of the cable looping ,the 2nd is my better alternative where I am making a barrel out of an old door pin drill it out to fit the cable and stopper and fit it where the original (bent) bolt went,hope this all makes sense.Ive had to drop my fiberglass floor pan about 4 times so far as my inspection plate bolts are all rusty.
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Im still having trouble with my cable had to use my ball of string again to get home I think my swage idea has failed,not detered I will have another go.I noticed though that I was not getting full revs,when adjusting the cable I had the foot pedal at an angle I thought was right but it seems when I pressed to the floor it was not opening the butterflies enough,my question is should I open the carbys fully and then adjust the cable while the pedal is flat to the floor so when I take my foot off the pedal it goes back to its proper position,hope this makes sense.