In many job application forms, they ask about 'visible identification marks'. In this particular field, an applicant has to fill any identification mark on the body that is clearly visible and by which he/ she can be identified. Any visible identification mark may be permanent tattoos, birthmarks, moles, or even some scars etc.
The main purpose of asking these identification marks is that if anybody goes missing or in case of an accident or any other mishappening these identification marks with description may help in the identification of a person.
Nowadays visible identification marks are not asked in most of the applications due to the use of Aadhar verification which is more accurate because of biometric data like iris, facial photograph and fingerprints authentication.
But still in many job application forms employer asked about one or two visible identification marks. In which you can mention any mole, scar or any birthmark.
If the location of the mole is wrongly mentioned in your secondary school certificate, I think it would not be any big issue because nowadays there are many advanced techniques available to remove the moles. So it may not create any problem.