I need some help with reinstalling the saftey selector on my Ace. While I have the left side thumb selector in, I am having a hard time with the right side selector.

What position does the thumb selector need to be in before the right side pin can fit into the left side selector arm hole?

Is this the same position that the other right side pin engages into the receiver hole?

And lastly, how much pressure is required to fully engage the right side selector into the receiver so that the selector is flush with the receiver and you can move in down to the detents?

Thanks!