X3 rain sensor

Would anyone be so kind as to take a close-up picture of their X3's rain sensor (from the outside of their car, aimed at the rearview mirror area, with good lighting)?

I just got a new windshield installed (non-oem), and the rain sensor isn't working now. When I compare to my E46, the E83 is missing the small clear dot which I thought was for the light sensor. However the E83 light sensor works fine. So I'm wondering if the large purple area is really for the light sensor, and the small clear dot is the rain sensor.

I went so far as to make an extension cable so that I could plug the E83's wires into my E46's windshield sensor. Everything worked dandy. So it's either the windshield & lens, or it's the sensor that clips onto the lens.

Thanks!