Go to the bb\Realtracks\UserTracks\Accordion, Rhythm Crossover Sw16 075 and open UserTracks_CrossoverSw75_PopSong_02_Endings.SGU
In Realband or BiaB.

If you look in RB you will see where the Hold... is played and where it stops. it will also load the original wav and play without generating up the RealTracks in you got to Preferences > Song Genaration > Uncheck "Also generate song when MGU file is opened"

Press F5 to bring up boxes as below.
I think they are still working on Shots n Holds for the UserTracks.