How to specify a point on the map (Yandex.Maps) by calling the js callback function (which receives the longitude and latitude and writes it to a hidden form field)?

Question

JavaScript

How to specify a point on the map (Yandex.Maps) by calling the js callback function (which receives the longitude and latitude and writes it to a hidden form field).
Simply put, in the add form I want to stir up the ability to specify not only the address of my object (street, house), but also the coordinates for Yandex.Maps, but not manually, but using Yandex.Maps themselves for this.

Answer 1

Too lazy to write a lot, just give a link.
https://tech.yandex.ru/maps/jsbox/2.1/event_properties