Non stretchable Rope

[Ronnie]

How can I have a non stretchable rope I'm using to cubes one at the start of rope and other at end of rope at 90 degrees. The upper cube is kinematic and lower one is rigidbody. As per obi 4 video it looks easy to make non stretchable rope using tethering and attaching particle in particle attachment script. But in oni 5 there is no option to see particpe and attach it and also no tethering so not really finding a way to make non stretchable rope or rod.