Help Proper way of moving rope end points

[josemendez]

So you mean If I use rigidbody AddForce with some damping factor to move the knob around will it solve physics breaking issue?

Correct.

I am attaching knob to a configurable joint and pulling configurable joint with its own rigibody MovePosition.

MovePosition is a method of Rigidbody. The joint is doing nothing at all.

So you are saying that joints are not required here just use knob rigidbody to move around ?

That's right: joints exist to be able to constrain multiple rigidbodies together. If you only have one rigidbody at each end, there's no use for them.