Electrical connector including a connector body having a mating side with a communication array of signal and ground contacts and first and second mounting sides with respective mounting arrays of signal and ground contacts. Each of the first and second mounting sides is configured to be mounted to a corresponding circuit board. The connector body includes signal and ground conductors that extend through the connector body and communicatively couple the communication array to each of the mounting arrays. The mating side faces along a mating axis and the first and second mounting sides face in opposite directions along a mounting axis. The mating and mounting axes are perpendicular to each other.