Attachments
Maybe someone else attending tomorrow can confirm whether there should have been attachments??
If so,. I would also flick a reply to your confirmation email just asking for them to be re-sent and hopefully they will get back to you.
Don't panic though, on my AD there was plenty of time in the morning. If someone else can confirm that there should be attachments just arrive a bit early & explain the situation, they will have copies for you to fill in (though don't spend all your free time filling in forms - make sure you're being chatty with the other applicants as well!!!).
You'll be fine!