Rob - the magnets are installed into blank-bottom holes drilled from the back of the baffle. I don't know how many are in the CS2.4. In the SCS4 there are 8. Two pairs about an inch from the top and bottom corners plus another 4 flanking the coax driver. The fields are strong enough to need a tool to remove the perforated steel grille. I'm not a fan due primarily to theoretical considerations of interacting magnetic fields with an electrically conductive aluminum baffle between them. My objection notwithstanding, I'm confident that Jim vetted the implementation and did not object to it. The magnets are probably far enough away to not do any real damage.
However I would rather have a mechanical solution and lose the hypothetical downgrade mechanism.