What your trying; using the Autel SC as a display could certainly be possible, if the hardware supports video in. That's probably not something Autel would have considered or given priority to with hardware likely sourced from the Automotive division or one of the parent companies suppliers.
A couple of observations:
I think you might get this to work using a utility on the SC to utilize USB as a display input. Look at the wired (preferable) and wireless (expect some lag from wireless latency) in the following article:
If you wanted an additional screen while working on your PC, you can now use one of these 5 apps to use your Android as second monitor for your Computer.
techwiser.com
If these don't work, you could make some discoveries along the way that provide a path to victory.
I still think 2.5 lbs weight for an 8" display is fairly ridiculous as far as efficient use of resources, namely your own, lugging and putting it on a tripod (as you and I have experienced works beautifully, but not quite the Mini 2 "stick it in your pocket on the way out the door" experience, lol.
Its not unworkable, just a bit beefy for the same protein you could get from jerky slim 8" tablet -
If you want to connect a phone or PC to the file system of the SC, it's easy to make it an FTP server for convenience:
1. Open CX File Explorer.
2. Scroll the location icons to the left or tap "Network" from the center menu of "Local / Library / Network"
3. Click "Access from PC"
4. Confirm you are on the same WiFi SSID as your target.
5. Deselect Random Port if you want a specific port number to be retained, otherwise just note the port #
6. Select "Start Service"
7. On your PC, Phone, Tablet or whatever client you want to use, open a browser and use the ftp address url that CX File Explorer provides.
Happy browsing. This can be convenient to download, upload or just manage files on the SC. There are better and more graphical connection utilities, but to paraphrase a Photography truism: The best utility is the one you have installed