In some schematics, "M3" refers to a Molex 3-pin connector (not a screw hole). If your search for apcb m3 94v0 schematic yields a board with a 3-pin power connector instead of mounting holes, you have a semantic mismatch. Verify the physical hardware before trusting the schematic.
If you have ever cracked open an older desktop or a low-profile workstation, you might have spotted a circuit board labeled APCB M3 94V-0 apcb+m3+94v0+schematic
If you are the engineer designing a board for this keyword, or if you are reviewing a schematic from a contract manufacturer (CM), watch for these specific pitfalls. In some schematics, "M3" refers to a Molex