I have seen braided copper method, have also seen slip rings, think all large vessels do that.
The idea is that hull
anodes could then protect the propeller
, without electrical current through the bearings/shaft coupling that may do electrolytic damage to the bearings.
If you have a shaft anode, that should provide anode current that will be contained by the propeller
shaft pair and give you shaft protection separate from hull.
Nothing wrong with the braided method, ideally it will remain redundant.
Lightening protection for insulated hull also need consideration, I wouldn't want to use shaft to take it all, but better than having nothing at all, (bang).