By headshells with fastening screw those 4 pin connectors have
two functions. The azimuth can be adjusted as well the stylus
distance (aka ''effective length'') . Because the sample provided
by @imhififan has to short ''inside part'' of the 4 pin connector
this second function can't be used. By AT headshells with, say,
''movable 4 pin connector'' this shortcoming is obvious.