Thank you, now I see what was done. This is referred to as a ball joint "flip" in other circles, and is a common modification when dramatically lowering a car. They have come up with a neat approach to reverse the taper in the knuckle (upright) and to remount the joint on the other side of the arm, so the stock parts can be modified to do this. It might(?) be possible to do a similar mod to the X's stock components. They also do the same thing with the tie rod when the original design has it located on top of the steering knuckle.This is from either very early example of Ritmo Abarth 75 Gr.2 or the car made it to the spec. because the control arm is made from original part.
Abarth have made rinforzato control arms and knuckles with the desired lower control arm attachment point. These two part have found way in the production versions of the Ritmo/Strada Abarth 125&130TC. They can still be found but expensive.
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I believe you saw solution with raised inner control arm point (with the same intent)