Apple MacBook A1181 archive for logic board 820-1889-A, packed in a 1.14 MB RAR; the name has macbook misspelled. The 820-xxxx number is Apple's logic board identifier and appears on the PCB, which is the reliable match since the A1181 model covers several boards. The name does not say what the archive contains, so check for boardview, schematic or EFI ROM files. Use them to trace rails, locate parts or reflash firmware, backing up the original chip before writing.
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.
7-ZipWinRARThe Unarchiver (macOS)