I believe that the oficial documentation of the installation of mSATA disk …
… is not complete because the mentioned slot next to the CPU cooler is occupied by a WiFi card.
It would be advisable to add a link to the video …
… and describe the procedure in documentation.
After moving it, you need to reconfigure the WiFi card by Info: Small thing to do after adding mSata SSD
Or is everything different and I’m mistaken?
Also a description for putting the terminal in Windows on COM3 is not for Layi