Archive of 178 KB labelled Z96FM, a board code with no stated brand, revision or description of the contents. Its modest size suggests a boardview or a compressed document rather than a full firmware set, so extract it and check the files inside. Related entries include a Z96Fm schematic, which can be used alongside it for tracing rails and locating parts. Verify the board code and revision printed on the PCB before using any layout or data from it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)