A connector housing includes a plurality of wafers containing terminal dedicated to either ground signals or differential signals. Terminals in adjacent wafers can be arranged to provide broadside coupled differential signal pairs. Terminals dedicated for use as ground terminals can be wider than the signal terminals to provide shielding between adjacent differential signal pairs. The signal terminals of each differential signal terminal pair can a constant width from their contact portions to a location proximate their tail portions and the terminals diverge from broadside alignment and increase in their width until they end at the terminal tail portions.