A 9.35 MB rar labelled only for the Apple iPhone X, with no indication of whether it holds schematics, a boardview, or other service data. The name is uninformative beyond the model, so open the archive and identify each file before use. iPhone X logic boards are stacked sandwich designs, and repair material helps locate test points, rail measurements and component positions across both layers. Make sure the contents describe the iPhone X board rather than a related model, as layouts differ between generations.
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 @schematic_mobile5. 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.