Hi Susan,
Page 2 of the Music Braille Code (which you can download through the BANA website) gives you the symbols you are seeking. Dots 6, 3 is the “opening music code indicator” and dots 56, 23 is the “music code terminator”. The MBC will also instruct you how to transcribe the time signatures if you weren’t aware already.
Typically, if the music symbol is the final part of a list (such as in a glossary) we don’t need to close it. The new line will let the reader know they are back in literary code.
Best!
Patrick