Hey Christina!
I would just braille is as poetry - with 1-3 margins - after the title and composer, before the music heading. I'd use uncontracted braille with the French accented letters.
I don't think there is such an example in MBC2015 but I think of this as an epigraph at the start of a book chapter. (Formats 9.3.1)
Hope that helps!
Kathleen