My I-693 arrived today, yehey!. I opened the mail and found another envelope that is sealed with red tape and was stamped "confidential". I assume that this is the envelope that the CS told me that I am NOT suppose to open and it needs to be send together with the rest of AOS papers. Together with the sealed envelope is a personal copy of I-693. Below is a pic of the I-693 package that I got from the CS (I covered my private info with pink highlight) .