The Carlinkit simply plugs into either one of the USB connections. Once it boots, the Lucid thinks it’s communicating to a direct wired iPhone. Attaching some additional photos of it running. There’s an Android app that will connect to your iPhone and allow you to run actual CarPlay through this device. So far it’s working really well.
Carlinkit runs Android and can run virtually any app available to an android phone. It has the ability to emulate CarPlay and/or Android Auto. Because the Lucid currently only supports CarPlay, once connected via the USB the Lucid thinks the device is an actual iPhone. As you can see in the pictures, the device then does its magic and displays its Android screen. One of the apps actually connects to your iPhone and runs CarPlay, so you don’t lose any CarPlay capability, you only gain from the ability to run whatever android apps you want to install. Another example - I installed ExpressVPN and once connected to a UK server I can navigate to the Channel 4 web page (My4), and stream their live Channels and recorded content.