HELP .....How do I assemble the invitations

This is so silly but I really have no clue the order in which to place things in the envelope for the invitations.

I have the Invitation

Reception Card
Response Card
(does that go in the small envelope ? or left separate ? )
Directions

hopefully this will help you

Packing invites

Great Info...thanks so much, it helped, got a few done last night :)