A connector system is disclosed that can include a first and second connector. The first connector supports a channel terminal that is U-shaped and includes a mating edge. The second connector includes one or more wafers that support signal terminals arranged in an edge-coupled manner. Ground terminals in the one or more wafers are positioned on two sides of a pair of signal terminals and are configured to engage the mating edge of the channel terminal. Each wafer can include a shield mounted on a side of the wafer. The shield can include arms that electrically engage ground terminals.