HI,on the edge to keep the black cardboard paper straight,glue the edge with "Gorilla" glue, the dome install with double side tape. The lead wire seems bigger than the original one and is install under the melinex dome,usually celestion have smaller lead wire and go true the edge on top of the melinex flange.It's important the dome to be solidly press down on is complete flat surface to keep the cardboad straight because the change of outside temperature have a tendency to curve. Athanasios, great job and not easy to do.
Yvan