Mysterious plug near headlight.

[Harten Eric 1LT 57 WG/DTWC <Eric.Harten@nellis.af.mil>]

While doing some close inspection of my headlight wiring (in preparation for
building secondary harness for high wattage bulbs) I noticed a mysterious
plug next to the headlight bulb socket on the passenger side.  The three
contact plug (almost like an audio XLR) sits just outboard and above the
headlight bulb and appears to be connected to the edge of the reflector.
Does anybody know what it plugs into.  It is right next to where the intake
sucks in air from behind the headlight.  Is it some sort in intake air temp
sensor?  OBTW, this is on a 95' 90 SQ 2.8      Any thoughts?  Thanks.

Eric Harten
1995 90 SQ 2,8
1999 Passat 1.8T