A connector locking holder includes an electrical connector having a first connector body with a first electrical contact, and a second connector body with a second electrical contact. The first connector body is configured to be coupled to the second connector body to provide the connector in a connected state in which the first and second electrical contacts are electrically connected to each other. A holder is configured to secure the connector to an assembly which includes the connector. An attachment is configured to attach the connector to the holder only when the connector is in said connected state.