Hi Cheri,
I have transcribed books with non-traditional examples like these, so I told Kathleen I'd reply.
Honestly, I just treat it as music braille. To try to represent it as in print with no staff lines I feel would be unhelpful because it is done that way in print for the sighted. So here's what I do:
I put any text/lyrics in cell 1-5. You can even add the "(3-4)" in the text line.
You'll treat the music as a single-line parallel. Start the music in cell 3 with the RH sign. Runovers to cell 5 if needed. The music in the RH can be treated in 4th octave and fingering can be included. If this is early in the book, you should put a flat on each note until the book teaches that the flat is dropped after the first one within one measure of music.
When the melody switches from RH to LH you can use the braille hand signs to represent the change of hands. You'd also want to use octave 3 for the LF music notes.
Let me know if you need more clarity!
Patrick Janson