I think you will find you are talking about the torque
arm.
These 124 arms are referred to by so many diferent names,
depending on what part house you check, that the confusion is understandable.
I have the job from the CD ,35-111, at the site listed below.
I have added the names of each arm according to the CD manual for any other 124 owners sake.

http://members.aol.com/ajdalton7/arms124.jpg