Order in Chaos

Action : Put the top two cards of target player's discard pile on top of his deck.

Question:

In which order are the cards put on top of the deck?

The first from the discard goes to the top of the deck, then the second.

Is there an official clarification to my question? Or anything in the rules/faq that supports your answer?

After searching the forums again, I see no clear answer to my question, even though it's bveen asked several times. Though most people thought you get to choose the order yourself.

Other opinions?

I also think you get to choose the order yourself, but I can't find a written record of that being a rule. If this didn't let you choose, the order would be ambiguous.