A connector assembly for an implantable device includes a feedthrough interface having a ceramic feedthrough and a ferrule attached to, and forming a perimeter around, the ceramic feedthrough; a lower contact housing coupled to the feedthrough interface, where the lower contact housing and ceramic feedthrough define wire holes extending therethrough; an upper contact housing attached to the lower contact housing and collectively defining contact receptacles, each of the contact receptacles defining an opening for at least one of the wire holes; connector contacts with each connector contact disposed in a one of the contact receptacles; and wires with each of the wires coupled to one of the connector contacts and extending through one of the wire holes so that the respective wire extends out of the ceramic feedthrough.