How to set movement coordinates for a unit?

Question

Unity

I need to put the unit at certain coordinates and pass it the value of where to go

public class Unit : MonoBehaviour{ // прикреплен к префабу
    public Vector3 EndPoint;
    private float speed = 2f;
 
    void Start(){
        //EndPoint= new Vector3(15, 0, 15);
        }
 
    void Update(){
        transform.position = Vector3.MoveTowards(transform.position, EndPoint, speed*Time.deltaTime);
        }
    }
 
public class Spawn : MonoBehaviour{
 
  void Start(){
    SpawnUnit();
    }
 
  void SpawnUnit(){
    Unit Prefab = Resources.Load("Units/unit1", typeof(Unit)) as Unit;
    Instantiate(Prefab, new Vector3(5, 0, 5), Quaternion.identity);
    Prefab.EndPoint = new Vector3(15, 0, 15);
    }
  }

But he does not go to the given coordinates, he goes in the other direction for a couple of cells.
If we remove Prefab.EndPoint = new Vector3(15, 0, 15); and uncomment EndPoint= new Vector3(15, 0, 15); it goes where it needs to go.
But in theory, I already pass it the coordinates Prefab.EndPoint = .... , why doesn't it work like that?

Answer 1

Unit Prefab = Resources.Load- this is a link to the resource, in it, in the mind, nothing needs to be changed in runtime.
Instantiate- and here there would be a link to an object in the scene, to which parameters should be set. But you do not save this link.