I checked the diagram for a 2002 240 DA. It looks like this. It still has the Mercathode system hooked in parallel to the bilge pumps and stereo memory. These are directly off battery 1 as before, although I did not include the battery switch in this image.
This is the way mine is wired, with a fuse instead of a breaker for the Mercathode system.
This is the way mine is wired, with a fuse instead of a breaker for the Mercathode system.