A boardview (component placement) file (board DAZAURMB8D0). Shared as “QUANTA ZAUR DAZAURMB8D0 BOARDVIEW (BDV)(.CAD) .rar” — a .rar file, 194 KB.
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 @generalbios. 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)