M&M-Module-Firmware Here will be the SENtral firmware files to be loaded on the M&M modules via the SD Card. You need to rename them sentral.fw for them to be loaded.

AMBER/sentral.fw PNI_MM_Amber_7186_di01-7186_di01.2.2.9050.fw COBALT/sentral.fw PNI_MM_Cobalt_7186_di01-7186_di01.2.2.9050.fw