hugobulnes

Hi, This is my first post, I hope I'm doing it right I have a cctv camera that I need to install, but it has only one cable with an S-vhs connector (4 pin connector), the situation is that I need to connect the S-vhs cable to a BNC in order to connect the camera to my DVR and also connect the camera to the power supply, and I don't understand which part of the s-vhs connector correspond to voltage and video. I cut the cable to give me an idea of what pin do what, but It has only 3 wires: Red, Black and Blue. So I understand that it has to have 2 wires for voltage and 2 for video, but I don't have so much experience in electronics. Can someone help me understand which cable are for what? Thanks