Archive named after the board number DA0Z8BMB6C0, a 1.40 MB RAR with no other details given, so the contents may be schematic, boardview or firmware and should be checked after extraction. The DA0xxxMBxx0 format is the numbering Quanta uses for its notebook boards, where the letters after DA0 identify the project and the final characters the revision. Repair documentation of this kind helps trace power rails and signals and locate parts. Confirm the full board code silkscreened on the PCB matches before relying on 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 @schematicslaptop. 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.