Here's how I added a USB power port to the overhead shelf on my 2015 TC LWB Wagon. I'll break the posts and pictures up for easier reading. I hate dangling wires so I wanted an overhead power supply for my dash cam. Rather than add yet another cigarette lighter socket for the plug in adapters that come with these type of accessories, I decided to go with a USB power port instead since they almost always use a 5v mini or micro USB plug anyway. Far more flexibility in cabling this way also instea