track arm

[moots]

changed my lower arm(track arm) last week.basically because there was a clunking sound and the ball joint rubber boot was torn.wrong!when off,the ball joint was still stiff (amazing).i also took the thrust arm out and found that the ball joint was much more loose than the track arm.the bushing looked good tho.anyways,looking at the track arm mount point,there is another point to mount the arm,on the outboard.anybody knows why?i am gussing it's for the M5 set up.anyone?

[moots]

changed my lower arm(track arm) last week.basically because there was a clunking sound and the ball joint rubber boot was torn.wrong!when off,the ball joint was still stiff (amazing).i also took the thrust arm out and found that the ball joint was much more loose than the track arm.the bushing looked good tho.anyways,looking at the track arm mount point,there is another point to mount the arm,on the outboard.anybody knows why?i am gussing it's for the M5 set up.anyone?

pic2