However, I am convinved that it should be possible with R-Link.
All required files are on the SD-card and when updating, Tomtom creates a .DCT file using the same method as in older navcore; i.e. using the map.meta and meta.txt. The issue is that the DeviceUniqueID is made of 12 characters (letter or digits) and unfortunately, known activating apps are looking for a DeviceUniqueID with 10 characters.
If someone knows how to create the map.meta.dct file?