These yellowish things are formation lights
You will find some some nice pictures in the web showing the funktion
Formation lights are used so that aircraft can fly close formation at night. They are typically luminescent strips positioned so that an aircraft can be in the desired position (i.e. fingertip formation) and have references fore-aft, up-down, and near-far similar to references as used for daytime formation flying. Something along the lines of, "keep the position light just below the formation light (strip) under the cockpit and the aft fuselage light (strip) just touching the wing hardpoint, and you're in the right position. If the position light goes farther below the strip, you're getting high; if the hardpoint is sliding back into the aft light you're getting close, etc."
Obviously these references are very specific to each individual aircraft.
7. November at 09:28:23