A transmission wire connector assembly incorporating a live contact test access position comprises a recess within the body of the assembly into which a connector extends, the recess being arranged to contain a non-conductive elastic self-healing sealant gel for providing a seal of the live connector with respect to the environment; and an electrically conductive contact member arranged to be disposed at least partially within the recess but normally held separated from the live connector and therefore non-live; the contact member being so disposed and arranged that upon applying a test probe thereto the contact member is moved into contact with the live connector to enable testing thereof to take place, the contact member being so arranged that upon removal of the probe the contact member returns to its normal position separated from the live connector.