Sony RM VPR1 Camera Plug Overview
To attach this cable to your camera, you just need to oriente it properly and push it straight-in on the center of the black part of the connector. On the other side the flat black socket is JR type socket with 3 pin. This JR type socket has an indexed side to perfectly match with the ILS male socket.
To remove the Sony RM VPR1 Camera Plug just pull straight out on the outer part of the connector. Never pull on the wire as it may damage the wiring.