I'd like to create a link to place in Google Maps with pin. The whole problem is that I can do this with default map from Google Maps
https://www.google.pl/maps/search/?api=1&query=50.942082,17.265832
But I can't do the same with my personal created map, I can only view my map centered at this point but without a pin.
https://www.google.com/maps/d/u/1/viewer?mid=1BTrDLSeOU2BOkc8dfbNaqxVHdNOn70Cl&ll=50.942082%2C17.265832&z=17
Is it even possible? I try to add "q" parameter but with no results. No pin is shown. It is very important to me to see exactly where this point is on my background map.