It's a pretty small and minor part in M8. As I recall, it starts after the three Penitent Women, when Una Poeten-(whatever her name is) starts singing "Neige, neige, du Ohnegleiche" (catchy, eh?), and continues through where the boys (Selige Knaben) sing, "Er uberwascht uns schon, an macht'gen Gliedern".
The texture is much thinned out during these passages, so there usually isn't much trouble hearing the mandolins (usually 2). I'm more concerned about whether an electronic organ will be used, or if Shrine Auditorium has a big-old Wurlitzer.