Much later but an update. Based on this IRC convo there isn’t really a way to connect leitmotifs or themes anyway, so it turns out it’s a mute question/difference!
tldr: just use the ‘based on’ relationship for now
@hay_ mentioned on Twitch that a Leitmotif is a melody which would constitute a work in MB? So maybe I create a work and then link that using ‘based on’…
Would both simplify and complicate it, as these melodies are used in multiple tracks on the first release/soundtrack. So eases the question of ‘what’s based on what’, but brings up the question of ‘what’s the motif called’…