A connector module includes a housing and a gasket. The housing is defined by a first shell and a second shell that mate at a seam. The housing includes a cable exit region extending along a cable axis. A passage through the cable exit region has an elliptical cross-section along a plane perpendicular to the cable axis. The gasket is within the passage of the cable exit region. An outer perimeter of the gasket in an uncompressed state has a non-elliptical cross section along a plane perpendicular to the cable axis. The gasket has an outer side engaging the inner surface of the cable exit region and an inner side configured to engage at least one cable received within the cable exit region. As the shells are mated, the gasket is sandwiched in a compressed state between the at least one cable and the cable exit region.