The sockets are equipped with magnets, for my eyes I place North at socket connect with South at eye, 4 magnets per eye.
I developed 2 eye sizes, for 70 and 80 mm acryllic domes. Pupil size is 42mm in diameter. I also did a placers - 0 and 18 degrees. It's needed for alignment both of eyes at same time. Following eye is made for 0 degre places socket and for acrillic dome 70mm in diameter.