Help Finding last point of rope

Code:
using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using Obi;



[RequireComponent(typeof(ObiSolver))]

public class CutRope : MonoBehaviour

{

    ObiSolver solver;



    void Awake()

    {

        solver = GetComponent<Obi.ObiSolver>();

    }



    void OnEnable()

    {

        solver.OnCollision += Solver_OnCollision;

    }



    void OnDisable()

    {

        solver.OnCollision -= Solver_OnCollision;

    }



    void Solver_OnCollision(object sender, ObiSolver.ObiCollisionEventArgs e)

    {

        var world = ObiColliderWorld.GetInstance();



        // just iterate over all contacts in the current frame:

        foreach (Oni.Contact contact in e.contacts)

        {

            // if this one is an actual collision:

            if (contact.distance < 0.01)

            {

                ObiColliderBase col = world.colliderHandles[contact.bodyB].owner;

                if (col != null)

                    TearRope(col, contact);

            }



        }

    }



    private void TearRope(ObiColliderBase col, Oni.Contact contact)

    {

        if (!col || !col.CompareTag("Saw")) return;



        // get the particle index:

        int particleIndex = solver.simplices[contact.bodyA];



        // retrieve the actor this particle belongs to:

        ObiSolver.ParticleInActor pa = solver.particleToActor[particleIndex];

        var actor = pa.actor as ObiRope;



        // not a rope, stop:

        if (actor == null) return;



        // check rope elements and tear the one that references this particle:

        bool torn = false;

        List<ObiStructuralElement> toDestroy = new List<ObiStructuralElement>();

        foreach (var elm in actor.elements)

        {



            if (elm.particle1 == particleIndex)

            {

                actor.Tear(elm);

                torn = true;

            }



            // deactivate particles of all elements after the torn one:

            if (torn)

            {

                actor.DeactivateParticle(solver.particleToActor[elm.particle1].indexInActor);

                actor.DeactivateParticle(solver.particleToActor[elm.particle2].indexInActor);

                toDestroy.Add(elm);

            }

        }



        // remove all elements past the torn one:

        foreach (var elm in toDestroy)

            actor.elements.Remove(elm);



        // update constraints:

        if (torn)

            actor.RebuildConstraintsFromElements();



    }



}