How do I add signs with qr codes to audio guides?

http://www.pirmasens.de/leben-in-ps/kultur/stadtarchiv/jugendforum/audioguide/schaeferstrasse/

https://www.pirmasens.de/bilder/stadtarchiv/projekt-jugendforum/neu-1.mp3?cid=1n41

via StreetComplete 62.0

Attached photo(s):
https://streetcomplete.app/p/317763.jpg