pulling objects across a collider

this script i attach to a collider and it pulls objects accross the colliders axis i chose. so if i set it to x axis any object that enters world travel along the colliders x axis at a speed i chose. but i want any object that enters just to move across the collider without following an axis. how can i do this? here is the script i attach to the colliders. @Priyanka-Rajwanshi @Bunny83 @Kilsnus @davidcox70 @oroora6_unity

     private List<GameObject> pullObjects;
 public Vector3 pullDirection;
 public float pullSpeed;
 void Start () {
     pullObjects = new List<GameObject> ();
 }

 void Update () {
     foreach (GameObject obj in pullObjects) {

         obj.transform.Translate (Time.deltaTime * pullSpeed * pullDirection,transform);


     }
 }

 public void OnTriggerEnter(Collider coll)
 {
     if (coll.gameObject.gameObject.tag == "Untagged") {
         
         pullObjects.Add (coll.gameObject);
     }
     
 }

 public void OnTriggerExit(Collider col)
 {
     if (col.gameObject.gameObject.tag == "Untagged") {
         pullObjects.Remove (col.gameObject);
             
     }
 }