Rotate Bullet with rotating Turret PROPERLY

Hey all,

I am making a top down 2D shooter. I want to achieve the following:

A is the base of the turret that rotates around itself. B is the cannon where the blue bullets spawn and fire from.

My problem is that I can't make the bullets rotate properly with the cannon. See picture B

I am using PoolManager to instantiate the bullet. Everything works fine except for the bullet rotation. Here is my code:

Turret.js

 var projectile       : Transform;
 var cannon          : Transform;
 private var spawnPosition : Vector3;
 
 function Start () {
     Fire();
 }
 
 function Update() {
     transform.Rotate(0, 10 * Time.deltaTime, 0); // rotate turret
 }
 
 function Fire () {
     spawnPosition = cannon.position;
     var bullet  : Transform = PoolManager.Pools["ProjectilePool"].Spawn(projectile, spawnPosition, projectile.rotation);
     
     Invoke("Fire", 2);  // invoke function every 2 seconds
 }

Bullet.js

 var speed : float = 10;
 
 function Update () {
     transform.Translate( Vector3(0,0,speed) * Time.deltaTime);
 }

I know that I shouldn't be using projectile.rotation in the Turret.js script but I can't figure out what to use instead. When I use the cannon's rotation, the bullet fires in the wrong axis.

Any help would be greatly appreciated!

Thank you!