Someone, If you mean how I accessed my HDX from my 2017 Honda wirelessly through bluetooth--Go to HOME screen of car options. From there choose SOURCE. Select the Bluetooth symbol. Click on it. Bluetooth search will find the HDX, and then make the connection. The HDX then stays in the car as a bluetooth option.
Actually my car will find any device that is in the car and will make a connection.
The only drawback to using the audiobook in my car is that my cell phone isn't connected at the same time.