HQ Interface question

By Ixamos, in Star Wars: The Card Game - Rules Questions

I got a question on HQ Interface which I need to clarify. If I have a HQ Interface in play and my opponent has 2 cards in his hand. When I successfully access his HQ, do I get to see his both cards in his hand simultaneously or one at a time?

… and IF I get to see both cards simultaneously, do I have the option on which card to trash?

Sorry .. post wrongly here. Please delete if able