How to create an animation with an object in the game?

Hi)) Can someone help me, please? I play The Sims on a MacBook and created an animation (where a game object, a decorative box, is involved). In the animation, my Sim is supposed to carry the box in her hands, but the problem is that the box doesn’t appear in the animation. I tried to make the box as a decorative item and added it to CAS, but the box turned out strange because it ended up being attached to her leg instead of her hand, even though I tried to replace a bracelet with it.

So, my question is, how can I create an animation in The Sims where an in-game object is used, and make sure it appears correctly in the animation?
P.S. I can’t modify the XML file because I use a Mac, and it only extracts binary files from the game, which I can’t convert to XML.