TUIK radiobutton animation

Hi guys!
Not sure where to start with this one…
I’d like to animate a TUIK radiobutton, not just the chops that are being output, but whatever DAT or script is also controlling the state of highlighting the active button so that I have feedback as to which button is active.
I can’t seem to find where the active button state is defined within the container.
Can anyone point me in the right direction?
Cheers,
Lloyd