I have a 2019 expedition and I am trying to install a rear seat entertainment system in the headrests. From searching it sounds like I need connect to 12v switched power supply, but I am unsure how/where the best place to do this is. The connection that comes with the unit looks like it plugs in somewhere, but most of the videos I have seen have people splicing and connecting the wires. Any thoughts or suggestions would be much appreciated. I included a picture of the connectors that come from the entertainment system that should connect to the car somewhere.