You can see a green one on the saucer and starboard nacelle in that picture. The red port ones are missing (or just blinked in the screencap)
I don't think they're nav lights, maybe just warning light idk.
Also look at the front of the bridge dome, there's no window, there seems to be a hull panel of the same shape in the spot where it should be.
Then look at the Chicago model posted above.
There is panel laying in the opening that looks like it could flip up and close the hole.
Or I'm just over thinking this and this is a low detail model with the bridge interior removed that wasn't meant to be seen that close.