So today I installed the remaining portion on the project in my car. I rooted the second wrote that goes to the driver seat. This was a little harder than the rear seat cable ad I had to take apart most of the car’s ceiling.
Now that all the routing is done, I will focus on adding an LCD display and mounting the Arduino in back of my rear view mirror. I also need to t-tap into my overhead light power source (i should also check to confirm that it is 12v).