Could someone tell me the correct adjustment procedure for the lower shift cable on an Alpha One Gen. I drive? I am confused with the 6" measurement from the center of the brass barrel to the center of the hole in the cable head. On my cable the brass barrel is pinned to the threaded portion. The only way I can get the 6" dimension is to loosen the small brass locknut and turn the cable. Is this incorrect? Now I am having problems getting into forward gear!