GetMousePosition within World Space Widget

Hello

I am trying to move a UI element to a certain position within my UI which is a World Space Widget: https://i.imgur.com/YOSKC5D.png

Right now what I did was: https://i.imgur.com/k9ajAfF.png and the result is this: https://i.imgur.com/IgqK9Y4.png
As you can see the UI is far away from the cursor. Is there a way to get the mouse position inside the main widget?

Thank You