Hi I am changing out my 100 amp panel to a bigger 100 amp square d QO for more spaces. the problem I have is there is an attached crouse Hinds meter socket. I can't figure out how to take off the cover to remove the meter? Does anyone know how the meter cover is attached to the box? its and older style ring type. When I pull on the meter it appears the cover is coming with it? Thanks for any advice.