1. Add your name as a prefix to the filename (e.g. JohnDoe_front.ai, JohnDoe_back.ai)
2. Click 'Choose Files' and choose a file.
3. Click the 'Upload' button to attach.
4. If you have more than 1 design to attach, choose 1 file and upload 1 file first. Then choose your next file and upload the next file.