How to know the orientation of the rope ends

[josemendez]

1. The attachment is static
2. The sphere gameobject is placed close to the ends of the rope

If the attachment is static, it won't be able to impart any forces on the game object it is attached to. However if the rope is very close to the gameobject and collisions between the rope of the object are enabled, the rope might be applying forces to the object because they're colliding against each other. This can result in random forces being added to the gameobject, deviating it from the trajectory it would have otherwise. This situation is described in the manual page for attachments, see "attachments inside colliders":
http://obi.virtualmethodstudio.com/manua...ments.html

You can disable collisions either globally (in the ObiSolver component, under "constraints" foldout) or for specific particles/colliders, using collision filters. You can learn more about filters here: http://obi.virtualmethodstudio.com/manua...sions.html

Is there any specific method/procedure to attach anchor Game objects at the ends?

Not really, the ends are just like any other point in the rope. The procedure is exactly the same regardless of the point in the rope you attach the object to.

let me know if you need further help,

kind regards