How to offset a RectTransform?

Hi all

I have an app where I need to use Screen Space - Overlay as the canvas type and have been rendering a line from one UI element to another using the following code that I found after some research:

 using UnityEngine;
 using UnityEngine.UI;
 
 public class UILineRenderer : MonoBehaviour
 {
     private RectTransform object1;
     private RectTransform object2;
     private Image image;
     private RectTransform rectTransform;
     private RectTransform object2Target;
 
     // Start is called before the first frame update
     void Start()
     {
         image = GetComponent<Image>();
         rectTransform = GetComponent<RectTransform>();
     }
 
     public void SetObjects(GameObject one, GameObject two)
     {
         object1 = one.GetComponent<RectTransform>();
         object2 = two.GetComponent<RectTransform>();
         
         RectTransform aux;
         if (object1.localPosition.x > object2.localPosition.x)
         {
             aux = object1;
             object1 = object2;
             object2 = aux;
         }
         image.enabled = true;
     }
 
     // Update is called once per frame
     void Update()
     {
         if (object1 != null && object2 != null)
         {
             if (object1.gameObject.activeSelf && object2.gameObject.activeSelf)
             { 
                 rectTransform.localPosition = (object1.localPosition + object2.localPosition) / 2;
                 Vector3 dif = object2.localPosition - object1.localPosition;
                 rectTransform.sizeDelta = new Vector3(dif.magnitude, 5);
                 rectTransform.rotation = Quaternion.Euler(new Vector3(0, 0, 180 * Mathf.Atan(dif.y / dif.x) / Mathf.PI));
             }
         }
     }
 
     public void DisableLine()
     {
         image.enabled = false;
     }
 }
 

I just call this using:

 uiLineRenderer.SetObjects(panelLineTarget, buttonLineTarget);

This creates the following result of drawling a line between the icon and the panel:

I'm trying to offset the RectTransform for the line so it starts at the top of the information icon. Does anyone have any idea how to slightly offset a RectTransform in a certain direction? I've tested a few different ways but had no luck.

Thanks very much for reading!