How to Open a white label activision cart

[How to Open a white label activision cart]

thanks i guess i'll dig my spudger out!

[How to Open a white label activision cart]

any idea's?

[How to Open a white label activision cart]

as the title suggest does anyone know how to open 1 of these without doing any damage? I've had abit of a google but can't seem to find anything for these carts
I've taken the sticker off but there is no screws .