Connector assemblies having cantilevered contact beams arranged in one or more arrays of terminals have their terminals fixed in place at a first point within insulative connector body portions. The terminals are fixed together by one or more support members within a hollow shroud, at a second point spaced apart from the first point. The present invention pertains to means for fixing the terminals and their support member to the outer shroud. In one embodiment, the shroud is square and has a series of slots formed in two opposing sidewalls. A key member has a plurality of biasing arms, or fingers that extend into the slots and into contact with the terminal support members. In a second embodiment of the inventions, the shroud is provided with a plurality of channels formed on the inner surfaces of two opposing sidewalls thereof. A retainer key is provided with a plurality of hook ends for engaging the shroud and spring arms that extend through openings into the shroud channels up against the ends of the support bar.