Quanta GM7B motherboard documentation at revision F for the Dell XPS L701X, packed in a 993 KB RAR archive. Dell sourced this 17-inch XPS board from Quanta, so the GM7B code on the PCB is what identifies it. The file likely contains a schematic for tracing power rails, GPU and CPU supply circuits, and charging logic when repairing no-power or no-boot faults. Note that a GM7 revision D also exists for the same model, so compare the code and revision letter on the board.
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 @IT_SERVICE_WORLD. 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.