The Mozart piece in that King of the Hill moment is most likely “Eine kleine Nachtmusik” or another familiar Mozart violin cue used in the episode, but the source I found specifically confirms only that Connie is playing Mozart on violin in “The Bluegrass is Always Greener.”

What the episode tells us

  • The episode summary confirms Connie is playing Mozart specifically while the guys are in the alley.
  • It does not name the exact Mozart composition in the snippet I found.

Best match

  • If you’re thinking of the recognizable, upbeat Mozart bit often associated with TV scenes, “Eine kleine Nachtmusik” is the most likely guess.
  • But based on the available source here, that remains a best-fit identification , not a confirmed one.

Episode context

  • The scene is from “The Bluegrass is Always Greener,” where Connie joins Hank’s bluegrass band and the violin/Mozart moment happens during the alley scenes.

TL;DR: The episode source confirms it was Mozart, but not the exact piece; “Eine kleine Nachtmusik” is the most plausible guess.