Hello :),
I contacted customer service and they asked me to do the following. After you create a profile on Ustravel website. Click on scheule appointment then choose IV address registration. It will open a menu that has all types of visas listed from a to z except the k1 visa so they asked me to pick any type of visa because it doesn’t matter and it won’t affect my interview. Follow the steps until you find a printable version page , this is the address confirmation that you need for the interview. They don’t deal with aramex anymore in cairo so your passport will return to SLS office. I hope you find this useful.