What in the heck is the slot just above my head light switch

What in the heck is the slot just above my head light switch gm slot MGM Resorts International is an S&P 500® global entertainment company with national and international locations featuring best-in-class hotels gmwin slot US405 Big Slot, Polished w GM Cap, 17X7, BLANK, XXmm, lbs, $1, US405780XX, US405 Big Slot, Polished w GM Cap, 17X8, BLANK, XXmm, lbs

gmwin slot GM documents call it a Toll Card Holder As it has been stated many times before According to GM it is a Toll Card Holder, here is a picture,

gm slot 88 Double-slot antennas on extended hemispherical and elliptical silicon dielectric lenses Publisher: IEEE Cite This PDF Filipovic; Gearhart;  Feyenoord GM Dennis te Kloese turns down Tottenham approach, expects Arne Slot stay James Olley, Senior Writer, ESPN FCMay 21, 2023, 04:44