Abstract: An electrical connector assembly includes an electrical connector with one or more latch receptacles, and a cover with one or more latches, in which the latch receptacles and latches are polarized so that a latch engages with a latch receptacle when the connector and the cover are aligned in a pre-determined orientation. In certain embodiments, the electrical connector has at least two latch receptacles, one of them being a first width and others being of a second, different width, and there are corresponding latches also of two different widths. In certain embodiments, the latches are in pairs, and for example, at least one pair of latches and receptacles of the same width will be on opposite sides of the cover. The pairs differ in width so that the cover is “polarized” to fit in only one orientation.