How do I set the sprite in a predetermined location while other are randomly placed?

Hello everyone, since I'm new here and about to lose my mind on this.

I'm making a puzzle type game in which there are 3 types of sprites placed as a grid on the array, all of them are in a Family which is having the behavior of Drag and Drop. You can swap all of the sprites with the drag and drop and two of those sprites are randomly placed on an array used. The last type of sprite is also randomly placed but is required to be in a predetermined location. How can I do that?

Help would be appreciated!

For this you don't pick with the family but the sprite object itself. Family is used when it applies to all.