Fujitsu LifeBook P7230 archive referencing M115 and board number 6050A2076901. The 6050Axxxxxxx pattern is the Inventec-style PCB numbering, so the motherboard was made by an ODM rather than Fujitsu itself, and that number is printed on the board for verification. Expect schematic material useful for following power rails, checking the charging circuit and locating test points. Unpack with WinRAR or 7-Zip, and confirm the full 6050A code and any revision suffix on the PCB match before relying on the drawings.
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 @generalschematics. 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.