Max entered Ausable's hotel room by using a passkey. When Ausable mentions the balcony and suggests that someone could access the room through it, Max corrects him. He clearly states that he did not enter through the balcony but instead used a passkey to unlock the door.

Furthermore, Max admits that he was completely unaware of the existence of the balcony. He even remarks that knowing about it might have saved him some trouble. This confirms that his actual method of entry was solely through the passkey, rather than climbing up from the outside.