A vehicular interior electrochromic rearview mirror assembly includes an electrochromic mirror reflective element assembly and a video display disposed behind a transflective mirror reflector of the mirror reflective element assembly. The transflective mirror reflector includes at least one electrically conducting metal layer and is disposed at a third surface of the rear substrate such that a perimeter border region of the third surface is substantially devoid of the electrically conducting metal layer. A third surface electrical conductor disposed at the third surface is in electrical connection with the transflective mirror reflector and may extend from the transflective mirror reflector and from the perimeter seal toward a perimeter edge of the rear substrate. The rear substrate may extend beyond a perimeter edge of the front substrate where the third surface electrical conductor is disposed, and the third surface electrical conductor may be electrically accessible outboard of the perimeter seal.