[Captain Ahab Jr]

Front might be done to minimise brake duct aerodynamic disruption on the ground effect tunnels.

Also the steering trackrod might be inside a wing shroud so having the caliper low increases the span of the aero section to maximise front down force as that will be the weak aero end of the car

Rear might be done to increase/optimise rear toe stiffness of the wheel carrier to maximise rear end cornering stability