Small 179 KB PDF named 3M-3006, classified as a schematic but without any device or brand information in the name. The designation could be a 3M product or part number, though that cannot be confirmed from the title alone, so opening the document is the only way to know what it covers. Short PDFs of this size are often datasheets or single-sheet drawings used to check pinouts, dimensions or electrical ratings. Verify the part markings on your component match before using any values it gives.
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 .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.