A circuit card assembly for a communication system includes a PCB having a slot receiving a second PCB of a second circuit card assembly in a board loading direction. An electrical connector is mounted to the PCB having a receptacle housing and a mating housing movable within the receptacle housing in a connector loading direction along a connector loading axis parallel to the board loading direction. The mating housing is movable in the receptacle housing in a connector mating direction along a connector mating axis perpendicular to the connector loading axis. Contacts of the electrical connector are mated with contacts of the second electrical connector in a contact mating direction parallel to the connector mating axis.