An apparatus for connecting two electrical connectors together includes a locking collar, a first electrical connector, and a second electrical connector. The first electrical connector includes one or more electrical contacts arranged to mate with one or more electrical contacts in the second electrical connector to form an electrical connection, and the collar is arranged to receive at least a portion of the connectors and releasably lock the first and/or second connector. At least one of the electrical connectors includes a main body portion with at least one channel on a surface for cooperating with the protrusion of the locking collar, and a contact portion with a cartridge positioned within the main body portion. The contact portion further includes at least a first male contact and a first female contact connected to the cartridge. A corresponding method and electrical connector are also provided.