Get the replacement shell and unscrew the 5 marked 3mm (21/32 in length) #1 Phillips screws with the screwdriver.
If you are unable to buy an empty VHS shell, you can also use one that already has a tape in it, just you would have to repeat step 3 to take out the reel.
Hello. Does anyone know where to buy new cassette parts including the shell, hub and all the internals? I'm looking to move tape from a broken shell to a new one so that I can play it and digitize it. Thank you.