An electrical connector provides electrical connection between first, second, and third printed circuit boards (PCBs). The connector defines spaced apart substantially parallel, first, second and third mating slots and includes a plurality of pairs of first terminals and a plurality of pairs of second terminals. For each pair of first terminals: the first terminals are electrically connected to each other; one of the first terminals is disposed in the first mating slot; and the other of the first terminals is disposed in the third mating slot. For each pair of second terminals: the second terminals are electrically isolated from each other; one of the second terminals is disposed in the second mating slot; and the other of the second terminals is disposed in the third mating slot. When first, second and third PCBs are received in the respective first, second and third mating slots, each pair of first terminals electrically connects corresponding traces of the first and third PCBs and each pair of second terminals electrically connects corresponding traces of the second and third PCBs.