How do I add extra in-game dance animations to stereo?

Hi! I'm trying to figure out how to add in-game dance animations to the stereo. I tried following tutorials on YouTube but I can't get the sims to act out animations I add. I've heard about XML Injector but am now sure how to use it especially for this situation. I took screenshots of what I would like to tune. I would like to create a list of animations connected to the stereo. And then insert that custom tuning into the stereo object as an "affordance". Thanks in advance.

ibb.co/P4NRCFZ
ibb.co/tmyFLgB