To add an Amazon Alexa device to a car without linking it to the vehicle's software, we need to take a few essential factors into account. First, we must address the power source, as the Alexa device needs power to operate. An appropriate adapter can be used to connect it to the car's 12V outlet. Next, it's important to place the Alexa device in a location where the driver can easily interact with it. A good central choice would be the dashboard or console, making it accessible to both the driver and passengers. For connectivity, the Alexa device can connect to the internet through the driver’s smartphone hotspot. Lastly, since the Alexa device won't be integrated with the car's speakers, we can set it up with an auxiliary cord or a Bluetooth speaker for standalone use.