The A10 has one adjuster on the clutch cable and front brake cable. Until about 1959, the adjuster was on the gearbox so it had a slot and threads and, correspondingly, the handlebar levers did not have adjusters. In about 1960, the A10 had adjusters on the handlebar levers so the front brake plate, and the gearbox lost their threads as the cable just has a ferrule at that end. The front brake cable mount still has a slot as the cable has a shackle on the end which, obviously won't pass through the hole. However, the clutch cable has a ball on the end which will pass through the hole in the inner gearbox plate.