Theres many errors and should therefore not be used as definitive in my view.
Starting by noting with colours identification of arms .... lists "trackod" while showing the pullrod link to suspension spring medium !!!
Next he identified the "separated" lower wishbone by pointing to one of the wishbone links and then the real "trackrod" which is the steering link and not "locating" the upright for load, just steering the upright !!!
By that presentation, I don't know if anyone can draw technical conclusion. Its significantly far away from decent analysis in many direction.
Reality though .... if one of the wishbone is split at its outer end (it's hard to see in those image) with their respective locations not stacked directly one above the other but distributed along the chassis direction, then turning the steering results in that end (top or bottom position) moving the upright axis in an arc, this pushes the upright inward or outward in relation to the chassis, then by having the steering rack as constant it will alter the toe geometry by this method.
Theres good uillstration of this in Audi (from original 8 platform early 90s) of splitting the top wishbone to do exactly this. The top wishbone separate with longitudinal separate outer locations for each. Turning the steering "folds" those two pivot along each other to not only shift the arms as it moves, but pivots the upright in firstly a tighter more confined space resulting in less "displacement" of the wheel while turned ( could be useful in F1 for less aero interferance) but also shifting steering geometry as it does this. That 8 chassis also driving front wheels for 4WD and so has useful benefit in that aspect to them.
There's other influence (weight distribution) in that example, but common observation is it lacks steering feel for driver though
Very good images those are, but not revealing with enough detail exactly where each pivot is located, making it difficult to describe the full effects of the geometry. Only a loose projection can be made in reality without that detail.
