So, I'd go for #3:

have a pre-selection dialog for the kind pattern (currently 30040/30041s or each kind alone), and have a small drop-down label, above or next to each section, where they can adjust the kind, but that is currently disabled and read-only. (They'll eventually need to be able to add/remove sections, as well, but that's future music.)

30041 alone because they may already have a 30040 and just want to add something new to the list.

30040 alone because they may just want to create an index for things that already exist.