Django Leaflet: Add form fields for latitude and longitude

Question

I am using the django-leaflet package to display the map in the django admin for a PointField. However, I wanted to put fields so that it would be possible to write the latitude and longitude, as an alternative to selecting the point on the map.

How can I add these fields to the form?

Note: the Django Map Widgets package has the ability to insert coordinates, but I don't want to use it because it requires a key.