The workflow is below...
Google Site, Edit, Insert Google Plus Photo Album, Choose Album, Extra Large, Center the Google + Photo Album, Save
2. Google + Home
3. Photos
4. Click all photos
4. Click all photos
5. Blue arrow on top left
6. Blue Arrow
7. Green Share button
8. Google + on computer
9. Photos
10. Click arrow of pictures
11. Move
12. Choose album
13. Should be in Google Site
VIEW THE WEB Album
VIEW THE SITE with slideshow