On my Moody37, which replaced my trusty MW 27 a couple of years ago, the anode, with the two special bolts is connected to all metal parts in contact with seawater throughout the boat: all skin fittings, seacocks, rudder shaft, engine, prop shaft tube, etc.
If your mooring is in an estuary, or marina where there is brackish water, don’t forget that an aluminium, rather than zinc anode is recommended.
MG Duff are generally recognised as being good quality, see extract from their catalogue in the photos.
You must be logged in to view attachments.