Say there's a function that instances a scene into the main scene.
var projectile = preload(path).instance()
projectile.position = (formula for calculating position)
projectile.velocity = (formula for calculating velocity)
however, i also need to reach a child of the projectile node, Area2D, to connect its body entered signal to the main scene. Is there a way to do it before adding the child, or do i have to do it after using $background.getnode()?