Paper Pieces do not fit each other Drag & Drop Game

[uranus123]

Godot Version

Godot 4.2.2

Question

I created drag and drop paper pieces and the result ended with each of them are in the correct position but I want them to be a complete picture without the gap. I followed the tutorial on Youtube and drop_zone is marker2D. Do I have to change it to specific type? How do I fix this Thanks for your help
The result

[uranus123]

[uranus123]

I change and adjust the drop_zone position and size to be fitted with the location of full picture