A vehicular accessory mounting system includes a structure adhesively attached at a region of an interior surface of the vehicle windshield. The structure is configured to accommodate an accessory. A light absorbing layer at the region of the interior surface of the vehicle windshield at least partially hides the structure from view by a viewer, who is external the vehicle, viewing through the windshield. The accessory views through a light transmitting portion of the light absorbing layer and through the windshield to the exterior of the vehicle when the structure is attached at the region of the interior surface of the windshield and when the accessory is accommodated thereat. The structure may include a mirror assembly mount button and the mirror assembly mount button may be configured to be received by a mirror mount of an interior rearview mirror assembly.