I've removed the dust cap from the high beam. There's more than 2 wires inside. My father-in-law and I investigated it yesterday. But our job yesterday was replacing the rear indicators with LEDs, we didn't spend much time on this.
If you get the angle right a glass bulb can be seen when standing in front of the car.
I've seen a video that acknowledges the existence of the circled bulb. The vid says to remove the high beam light to gain access to the smaller (T10) bulb under it. But I have not done that yet.
I'm starting to think the Premium version of this car has this bulb wired up, but my non-premium does not.
I think the premium uses the DLRs as indicators too. Maybe this little bulb comes on while driving the premium so there's always some sort of DRL, even when indicting a turn?