same coordinates in dimensions

Hello, I am working on a mod that adds a new dimension of space. Instead of a portal, I have an entity that you right click to teleport. Each time the player right-clicks a block, it will teleport the player to the world coordinates of the spawn, and not to their current coordinates, and vice versa from the dimension to another world.
i want the same coordinates in both dimensions. if possible, you can take a screenshot of the finished procedure