Compute translation vector

This is a 2D game and everything has y=0. I want to move a GameObject from position A to position B using Transform.Translate and has some limits on the translation. But I have problem on how to compute the translation vector.

Code (CSharp):

1. public void MoveToUsingTranslation(Vector3 targetPos)
2.     {
3.         Vector3 translation = Vector3.zero;
4.         // translation = ???
5.         translation.x = Mathf.Clamp(translation.x, -1500, 1500);
6.         translation.y = 0; // 2d movement
7.         translation.z = Mathf.Clamp(translation.y, -1500, 1500);
8.         transform.Translate(translation);
9.     }

 

https://docs.unity3d.com/ScriptReference/Vector3.MoveTowards.html

 

MoveTowards doesn't take rotation into account

 

How about https://docs.unity3d.com/ScriptReference/Vector3.RotateTowards.html

 

Well I don't want to rotate it