How to determine the coordinates of a label on a Google Map?

Question

Google Maps

Hello. There is a google map on the facebook app. It has labels for some objects. So I need to determine these coordinates of these marks in order to place these marks in the mobile application on the Google map in the future.
For example, I know such a service https://www.google.com/maps/d/viewer?mid=zvb41B-hF...
here you can put a mark, where you need to get the coordinates. But I do everything as it is written, I press the right mouse button, but the window does not appear. Who knows what the problem is or how can I determine the coordinates differently?

Answer 1

To the author of the question, the answer may no longer be relevant, but if someone else needs it:
Then everything is the same as what is written on the link, do it on the map of Google itself.
Select the item, right-click, in the context menu, the item "What's there?", And voila, a block appears below with information about the point, including coordinates.