A connector (10) is configured for mounting to a panel (12). The panel (12) has a mounting aperture (18) formed with a keyway (22). The connector (10) has a housing (24) with a front end (26) dimensioned to pass through the mounting aperture (18). However, keys (44, 46, 48) project out in proximity to the front end (26) of the housing (24). At least one of the keys (48) is dimensioned to pass through the keyway (22). A stop flange (50) projects out from the housing (24) rearward of the keys (44, 46, 48). A resiliently deflectable locking finger (60) projects forward of the stop flange (50) and is dimensioned to engage in the keyway (22).