How to shoot a projectile toward the center of the screen

Hi everyone.

I can't understand how the projectile launcher configured in the "Simple Shooting Mechanism" demo manages to shoot toward the center of the screen.

It has no rotation, yet it's pointing downward, and its scale is extremely large. When I try to recreate that hierarchy from scratch using another grabbable object, I can't get the same result.
Thanks to anyone who can help!