hardwareRockchipRK3588AFE-R761_wiki_dataAFE-R761 DIN RAIL Kit InstallationAFE-R761 DIN RAIL Kit Installation Unscrew the 3 x M3x4L screws from the back side of AFE-R761. 2. Secure the DIN-rail bracket using 3 x M3x4L screws on the back.