How do I get into a Vandy?

I've got a pair of 3A Sigs. and would like to get into the speaker, but need some instructions on how to release the "sock" without causing any harm.

I would guess that my first step is to pry out the panel on top of the speaker. However, I'm hesitant and would very much appreciate the help of anyone who has gone through this exercise.

Thanks,
Brian Elliott