BoundingPositioning.cs

using UnityEngine;

public class BoundingPositioning : MonoBehaviour
{
    public Anker x = Anker.center;
    public Anker y = Anker.center;
    public Anker z = Anker.center;

    public MeshFilter mesh = null;

    public enum Anker
    {
        min = 0, center = 1, max = 2
    }

    private void OnValidate() => UpdatePosition();
    private void Awake() => UpdatePosition();

    private void UpdatePosition()
    {
        if (mesh == null
         || mesh.sharedMesh == null)
            return;

        Vector3[] bounds = {
            mesh.sharedMesh.bounds.min,
            mesh.sharedMesh.bounds.center,
            mesh.sharedMesh.bounds.max,
        };

        transform.position = new Vector3(
            bounds[(int)x][0], 
            bounds[(int)y][1], 
            bounds[(int)z][2]
        );
    }
}