I have had work done on my boat as I add shore power and latter charger and golf cart batteries for ships power. The shore power is now hooked up and I am waiting for delivery of two of four batteries I have ordered. My question is this; the chap I hired hooked up the ground for my breaker box etc to the head through the hulls in my 75 Catalina 27; is this okay? Is there a better way to ground the boat electrical system, which will eventual be hosting radar, chart plotter and fish finder - all sitting in boxes at home as I speak?