A boardview (component placement) file for Lenovo hardware (board NM-B891). Shared as “T490s FT491FX390 NM-B891.rar” — a .rar file, 15.0 MB.
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 @dtechbios. 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)