An electro-optic element of a display of a vehicle includes a first substantially transparent substrate defining a first surface and a second surface. A first edge extends around the first substrate. A second substantially transparent substrate defines a third surface and a fourth surface. A second edge extends around the second substrate. A primary seal is disposed between the first and second substrates. The seal and the first and second substrates define a cavity therebetween. At least one of the first and second edges is stepped proximate the seal to define a channel. An electro-optic material is positioned within the cavity.