The connections on the reversing / rear-view camera cables push in and then screw up creating a secure connection. They come with rubber O-rings creating a waterproof join. The extension cable is airline aviation cable and has a 4-pin female end and a 4-pin male end. NAS cameras come with a 4-pin female ended connection and require the 4 pin male ended extension cable. NAS monitors have the 4-pin male ended connection and require the female ended extension cable. If you have a different brand of monitor or camera to the NAS Electronics range and it does not have a 4-pin connection and has a RCA connection instead you will require one of NAS RCA Cables and these can be found here RCA Cables.
Secure Waterproof Cable Connections
Cameras have the 4 Pin Waterproof Female Plug GX12 Aviation Plug Connection