Unity UI Instanciante a GameObject from script and place it randomly into a panel

Hello All,

I try to instanciate a GameObject ( I mean a gameobject with a transform position, there is no canvas on it) => it's a dice Prefab for example

And I do have in my project a Canvas (screen- space overlay) with a Panel => deviceContainer

Si I do not have issue to instanciate dices from the prefab :

diceClone = Instantiate(dice, new Vector3(x, y, 0), Quaternion.identity);

But how I can be sure that my diceClone will be randomly inside the panel DeviceContainer (even if I change the resolution).

Thanks for your help
Xavier