What is the best way to detect Touch between two anchored parts?

I have moving animated models with anchored HumanoidRootPart as primary part, with no "Humanoid, but with AnimationController. It's using TweenService on HumanoidRootPart to move, and models pass a zone, that is an anchored part.

As two anchored parts - zone and HumanoidRootPart - can't fire Touch event, i was hope, that other parts like hands will fire it, but they doesn't.

All parts of the models CanCollide = false (if it's important)

So is there any alternative solutions for how to make it clear to a part, that it touched another part? Or the is there any way to call Touch Event in that case?