Place it at the very end of a helpful moment, just after the favour or gift appears on screen, so the thanks closes the scene. Follow it with a light laugh or a short cheer to round off the exchange, rather than opening with it before the viewer knows what happened.
關於此聲音
This is a short Polish voice clip, about a second and a half long, in which the toad adviser Ropuch says thank you in a warm, slightly formal tone. It feels polite and charming rather than loud or jokey, like a small bow after a favour. It comes from episode 2x08 of Kuce z Bronksu, credited to Doradca Ropuch.