How to scroll to specific element in a scrollcontainer?

Question

I have a several button on scroll container and I want to center the view on a specific button when the scene start without loosing the ability to scroll
I tried to use scroll_horizontal property to specify the current horizontal scroll value in the ready function but It doesn't work no matter what value I use

Comments

Can you post your code?

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not much of a code

a little script attached to the scrollcontainer
changing the scroll_horizontal property in the editor show the desired effect but when playing the scene the it goes back to 0

extends ScrollContainer


func _ready():
    scroll_horizontal=600
    pass # Replace with function body.