Anyone know where I could get the extension power cord for the Kenwood CMOS 230, I can't seem to see it other than packaged with the reversing camera and I'm not paying another 80 quid for a 10 quid cable? It's got a connection to the actual camera that I can't see on other video cables, it's only got a yellow RCA connector at the headunit end, the camera end has a more specific plastic push connection. Hopefully the picture below will show what I mean, I'm looking for the wire on the right.