Connectors for smart windows

A window unit comprising:

• an insulated glass unit including an optically switchable pane;
• a wire assembly attached to an edge of the insulated glass unit and comprising wires in electrical communication with distinct electrodes of the optically switchable pane;
• and
• a floating connector attached to the distal end of the wire assembly, the floating connector electrically coupled to the optically switchable pane, wherein the floating connector comprises:
• (i) a flange and a nose extending from the flange by a distance approximately equal to a thickness of a first frame in which insulated glass unit is to be mounted, wherein the nose comprises a terminal face presenting two exposed contacts of opposite polarities, and
• (ii) two holes in the flange for affixing the floating connector to said first frame, wherein the two holes are arranged with respect to the nose such that the nose is closer to one of the holes than the other, thereby requiring that the two exposed contacts be arranged in a defined orientation when the floating connector is affixed to the first frame, or an asymmetric element in the shape of the nose and/or the flange that permits installation in only one way.