Why hasn't anyone else noticed this in the headlight assembly?

In my U.S. 2011 Prius 4, the headlight assemblies each have a horizontal row of 5 LEDs located immediately below the parking light (which is at the top of the assembly). These are never energized no matter what position the headlight switch is in. I can only assume these are utilized in the Canadian version of the car as daytime running lights.

I've read all the threads about daytime running lights, most of which are quite old. No one has mentioned the headlight assemblies (at least in 2011) already containing LED daytime running lights. Since they are already there, it should be a very simple matter of connecting them to a 12 volt DC source through a simple 12 volt DC single-pole single-throw relay that deactivates the LEDs whenever the headlights are energized. (Note: I'm an Electrical Engineer.) My only question is where does the LED wiring come out of the headlight assembly. I did not remove the headlight assembly, but I didn't see any unused cables or any other indication of wiring from the LEDs exiting the headlight assemblies.

So, my question is, does anyone know where the wiring from the LEDs exits the headlight assemblies?
Stu

 

I'm visually impaired.
Stu