To connect your Android to your car USB, you will need a USB cable. Once you have the USB cable, plug it into your Android and then into your car's USB port. If your car has a USB port that is not clearly marked, consult your car's owner's manual to find its location. Once the USB cable is plugged in, your Android should automatically begin charging. If it does not, you may need to select the "USB charging" option from your Android's settings menu.