A board-mount electrical connector includes an electrically conductive rear shell interposed between a contact-retaining front body and an insulator member that holds a plurality of board-mount contacts. The rear shell includes at least one electrically conductive shielding divider that extends through the insulator member and is positioned between two or more of the board-mount contacts. Also disclosed is a rear shell elbow for an electrical connector that is assembled from a pair of slidably interlocking members that form an X-shaped divider within the rear shell when assembled.