get the OnCollisionEnter or Stay from the parent?

Hi there!

I have here a little problem going on. I have a Cube with a BoxCollider and a Rigidbody on it.

I want to have sound effects from the Cube when it hits something with a specific force and when the Cube is sliding on the floor. So I wrote a script with OnCollisionEnter and OnCollisionStay and a AudioSource and put them into the Cube.

but now if the Cube hits the floor the OnCollisionEnter sound is canceled right after that because it will sometime slide on the floor a little bit and so the OnCollisionStay overwrites the sound that should to be played with the sliding sound.

so I came up with the Idea to make 2 AudioSources but on One Gameobject it wont work. so I put 2 emptys with AudioSources on the Cube and rewrote the script for each.

but now I dont get any respond from the scripts and thats because the scripts dont have any Rigidbodys or colliders...

so how do I get the collision info to the child emptys?

here is the impact script from the child object.

 #pragma strict
 @script RequireComponent(AudioSource)
 
 var impactMagnitude : float = 0.01;
 
 var crVelocity : Vector3;
 var crMagnitude : float;
 
 
 function OnCollisionEnter (collision : Collision)
 {
     // Debug-draw all contact points and normals
     for (var contact : ContactPoint in collision.contacts)
     {
         Debug.DrawRay(contact.point, contact.normal, Color.white);
     }
 
     
     crVelocity = collision.relativeVelocity;
     crMagnitude = collision.relativeVelocity.magnitude;
     
     var propInfo = transform.parent.gameObject.GetComponent(Prop_Info);
     
     if (collision.relativeVelocity.magnitude > impactMagnitude)
     {
         audio.clip = propInfo.PropSoundFX.impact[Random.Range(0,propInfo.PropSoundFX.impact.length)];
         audio.volume = (collision.relativeVelocity.magnitude / 5 + 0.5);
         audio.pitch = (Random.value * 0.4 + 0.8);
         audio.Play();
     }
 }