Due to the choice of components and desired 12v DC power supply, the basic circuit is quite simple. The display is powered directly off of the 12v DC source while a buck converter provides the 5v DC the camera needs. Connect the CVBS output of the camera to the AV signal line of the display and tie the AV GND to ground and you have a working circuit.

Building on that basic circuit I added an inline fuse and power switch, an LED indicator light, and a 1K pot to control a pair of LEDs in series down in the camera module. It would be easy to wire everything together directly, however I chose to try out the Adafruit Perma-Proto Half-sized Breadboard so that I could use 2.54mm JST-XH connectors. This worked quite well through the plethora of assembly/disassembly so common in prototyping. In the end I wished I has used the 1/4 size Perma-Proto board for just that little extra room in the case, but over all I am quite happy with the result.