Drag/Drop Puzzle Click

I have a working model of a puzzle that will lock into place, but I’m having trouble starting one puzzle piece from one place of the scene, then drag to another specific point to lock. I’ve seen a lot of 2d tutorials and similar help but nothing that is quite what I’m looking for. Any starters, hints, help?

Using DragQueen 2d asset by ChristipherCreates. Works wonderfully!