The SE and SE/30 have a metallic spray paint on the interior of the computer housing that acts as shielding. IIRC the Classic and Classic do not in order to save costs, and I believe the FCC regulations changed over time allowing them to move most of the shielding to the chassis.
There are some...
The case cracker is harder to find these days. You WILL need a long shaft Torx T15 screwdriver to remove the screws under the handle (at least 15cm long) And I have found that a set of plastic spudgers is gentle enough to loosen the plastic around the case so you can pull the back half off...