If you’re like most people, you probably rely on your car’s audio system to keep you entertained while on the road. But what if you want to add an auxiliary port so you can use a portable music player or audio interface? Here’s how to do it. First, find out if your car has an auxiliary port. If it does, find the connector for the port and plug it into a power source (like your cigarette lighter). If your car doesn’t have an auxiliary port, you’ll need to buy a adapter. Next, connect your portable music player or audio interface to the adapter. Make sure the device is connected to the correct input (usually red) on your aux port. Finally, turn on your car’s audio system and enjoy your tunes! ..