Initially suggested by wmorg via community forum:

the workflow is like this:

discID not found in Picard

discID 1 not found transmit data888×332 18.6 KB
 

MusicBrainz opens, user is logged in

discID 2 CD nachschlagen1200×573 87.6 KB
 

search result for artist

discID 3 result of search for artist1174×563 56.6 KB
 

clicking the artist link opens the artist page in MB - thats not what I want or expect as a user at this point of the workflow

 

discID 4 clicking artist link1168×658 132 KB
 

but when activating the radio button

the expected window opens

discID 6 list of open CD-TOCs1194×581 95.2 KB
 

OK, I know and will not forget.
I have a tiny bit of application programming.
This kind of fork in the workflow might have technical reasons, thats OK.
But for a user at least some hint in the text what to do to get to the CD-TOC attach window would be kind.

Thanks for your support!
(Perhaps its only the German version?)