How to adjust borders with collider?

Question

Unity

I have a prefab (BoxCollider2D) in it 4 prefabs (4 rectangular pictures of the border, along the edge of the collider), I want to change their position by changing the borders of the collider, that is, attach the pictures to the borders of the collider

public class Border : MonoBehaviour{
    public GameObject BRight; // 25, 0
    public GameObject BBottom; // 0, -25
    public GameObject BTop; // 0, 25
    public GameObject BLeft; // -25, 0
    public BoxCollider2D BorderBound;
    public void UpdateBorder(){
        float BSizeX = BorderBound.size.x;
        float BSizeY = BorderBound.size.y;
        float BOffsetX = BorderBound.offset.x;
        float BOffsetY = BorderBound.offset.y;
        BRight.gameObject.transform.position = new Vector3(11f + BSizeX, 0f, 0f);
        //BBottom.gameObject.transform.position = ....;
        BTop.gameObject.transform.position = new Vector3(0f, 11f + BSizeY, 0f);
        //BLeft.gameObject.transform.position = ....;
        }
    }

at the moment it turns out to bind to the right and top side, but when I bind the rest, carousels begin, I suppose you need to take offset into account, but I still can’t figure out how it should be correct, tell me how it should be?