Strech object between two points

Hi guys, i had a problem on pre publication time, one think become one of greatest problem i ever meet. I have a game with some mechanism, u can see it on screenshot, the point of a game is stretch rood between two round
mechanism. but i cant make it well, it always to far or too close. Very need your help. thx.
I do it that way :

_ gameobject1 and 2 its two round mechanism.

Vector3 mousePos = Input.mousePosition;

Vector3 objectPos = Camera.main.WorldToScreenPoint(transform.position);
mousePos.x = mousePos.x - objectPos.x;
mousePos.y = mousePos.y - objectPos.y;

// rotate to right direction
float angle = Mathf.Atan2(mousePos.y, mousePos.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.Euler(new Vector3(0, 0, angle));

// stretch stuff
var distance = (_gameobjec1.transform.position - _gameobjec2.transform.position).magnitude;
GetComponent<RectTransform>().localScale = new Vector2(distance/3f, 1);

P.s sorry for my bad english..

 

Hey!

are those values in screen space?

if not, you should probably get on screen positions of this objects

 

in code:

create a cube that is at the start.

make the cube look at the end

Parent the object to that cube.

use the Z axis on scale on the cube to stretch your object