Sensei Erik Paulson demonstraits two finishing holds based on how you catch the Thai Round Kick. Catch A (or Overhook) is followed by an Achilles Tendon Hold, A Foot Lock and then a Heel Lock. Catc B (or Underhook) is followed by a Straight Knee Bar

a number of leg locks as a counter to an armbar when stacking up on your opponent

ankle lock from countering an armbar

Erik Paulson - Key Lock from Kesa Getami (Scarf Hold)