It's very easy to forget this step when splicing. Slide several heat shrink wrap tubes over the prepped wires. You'll want a small one on the red wire and black wire and several much larger ones on the camera cable for putting it all together later.

Heat shrink wrap tubing is cheap - you're better off having an extra tube on the wire that you don't need (and can carefully cut off later) than being one short and having exposed wires.