When creating an object, you can set its UID as value of a cell.
This way, if you know what your cell is supposed to be (for example X2 is supposed to be red) the UID contained at Array.at(2) will be of a red sprite.
(in the event where you Create object Sprite, you set Array X 2 to Sprite.UID)
Your sprite can be red by either being an instance of a Sprite that only contain an animation frame Red, or the instance of a Sprite that is set to animation frame Red and whose animation is 0.
Depending on what you are attempting to do with your Sprite later on, one or the other solution may be more appropriate.