How to add extra degrees to an object?

Question

Unity

I'm doing something like assembling a PC. But there is a problem, if the object is not level, then the RAM does not rise evenly (you can see it on the video).
How to add degrees to stand up straight?

The code

using UnityEngine;

public class MotherBoardPlace : MonoBehaviour
{

    Collision collision;

    private void OnCollisionEnter(Collision collision)
    {
        this.collision = collision;
        switch(collision.collider.tag)
        {
            case "Processor":
                Place("ProcessorPlace", new Vector3(0, 0, 90));
                break;
            case "ram":
                Place("RamPlace", new Vector3(0, 90, 0));
                break;
            case "CpuFan":
                Place("CpuFanPlace", new Vector3(0, 0, 0));
                break;
        }
    }

    private void Place(string PlaceName, Vector3 Angle)
    {
        collision.rigidbody.isKinematic = true;
        collision.rigidbody.detectCollisions = false;
        collision.rigidbody.useGravity = false;
        collision.transform.eulerAngles = Angle;
        collision.transform.parent = transform.Find(PlaceName);
        collision.transform.localPosition = new Vector3(0, 0, 0);
        Grabbing.grab = false;
    }
}

Video

Answer 1

When "docking" it is necessary to make the board a child object of the body, and then indicate to it the relative rotation.