How can I fix my CCD Camera :(?

PLEASE HELP:

I have x2 - 12v ccd camera's that both have the wire ends cut inside the wire there is 3 other wires a black a red and a yellow i gather the red is the 12v poss and the black 12v neg so the yellow must be the video can i repair and put a bnc end on the wire iv tryed but i must be doing something wrong please help...

Thank you.