1. A rearview mirror assembly for vehicles comprising: a case having a reflective mirror element; a support on said assembly for mounting said assembly on a vehicle; a modular carrier member formed separately from and mounted on said case, said carrier member including an electrically conductive circuit and a support body, said circuit being formed separately from and secured to said support body, said carrier member providing an integral support, electrical connections for, and an electrical distribution network to at least one electrical component in said case; and said rearview mirror assembly including a video device comprising a camera, said camera having a field of view principally providing a view of the head of the driver, said video device being electrically coupled to said circuit for operation in said mirror assembly.