MacBook Pro 13-inch A1278 archive for logic board 820-2565-A, revision A, as a 3.02 MB RAR. Apple identifies logic boards with 820 numbers, and the trailing letter is the revision, so check it against the silkscreen on your board. The name does not state the contents, but packages like this usually include a schematic and possibly a boardview. Use them for following power sequencing, checking the SMC and charging section, and locating short circuits with a multimeter or thermal camera.
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 @hrtechno. 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.