Where is the True Tone ambient light sensor on the 2018 MacBook Pro?

The 2018 MacBook Pro has an ambient light sensor for its True Tone display. Where exactly is this sensor? I'm hoping for a diagram so that I know where exactly to position a webcam slider cover without blocking the sensor.

According to MacRumors:

Apple says the new MacBook Pro has a multi-channel ambient light sensor, next to the FaceTime HD camera

but that isn't specific enough to tell which side or how far from the camera.

Solution 1:

I know this has been answered but I thought an image may be useful to anyone else looking for the answer.

Solution 2:

The sensor is 1/2 inch to the right of the camera.

I pointed the display at a bright light and opened the Display system preference. I moved a small object along the top of the screen until they brightness changed.

Thanks to Solar Mike for the idea.