The XML file must be packed into the Serato MIDI folder. This can be found in your own files in the Music folder. The X1 MK2 must be in MIDI mode. The drivers for the X1 must be installed beforehand. If everything is connected correctly, the X1 can be seen in the Serato settings, in the Midi Tab. The added XML file should now also be visible in the lower Area. This now needs to be selected and loaded for the Kontrol X1 MK2.

Well done :)