An outer housing is configured to receive alternative first and second housings. The first inner housing is configured to receive clean body contacts where the inner housing includes integral locking latches extending into the contract receiving cavity where the locking latch may be positioned against the shoulder of the contract retaining the contact in position in the cavity. Alternatively, a second inner housing may be provided with a locking shoulder against which a locking lance of an electrical contact having a locking lance may be provided.