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Therefore in a crosswind (blue arrows in diagram below) there will be a force exerted forward left to the car (if it's designed like a vertical airfoil). But to create forward thrust and not forward left, boats have the keel (the thing under a boat) that creates a force to the left. The steering fairing design would have to somehow mimic this to create forward thrust.
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Example of Boat Kneels
Turns out in our glory years in 2012 the car used sailing so maybe rip off some info from those days.
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Examples of past cars that utilized sailing:
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Note: This car used crab steering to help the “sailing” effect described above
Important Notes
As per https://materialdistrict.com/article/solar-car-sails-wind/ the race track is typically a straight line with winds mostly coming from the same direction
This would massively increase the benefit of the sail
The car’s canopy and wheel were specially designed for this
Also has a detachable wing to help panels collect more wind