Archive of about 929 KB tied to the Gigabyte B560M D2VX motherboard at revision 1.0. The SI token is not explained in the name, so the exact contents are uncertain; it may be a service or signal information document. Open the RAR to identify whether it contains schematics, boardview or other data before use. For any repair document, match the revision printed on the PCB with the file, since Gigabyte changes layouts between revisions of the same model.
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 @Boardviewno. 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)