RAR archive of 53.9 MB for the Motorola Moto Z, model XT1650. Contents are not listed in the name; the large size points to several documents such as schematics, board layouts and service guides, or possibly firmware. Unpack it with 7-Zip or WinRAR and check each file first. Such material helps trace power and charging rails, locate components and test points and diagnose shorts on the logic board. Confirm the exact XT1650 sub-variant on the device, as Moto Z editions share model prefixes but can differ.
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 @esquemaseletricos. 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.