#1 is a volt meter. You have 120 volts +/- to the panel.
#2 is the 120 volt circuit breaker for the battery charger. It is turned off. Make sure the boat wires you disconnected from the battery charger are not touching anything and then turn it back on. You should have voltage to those wires...
http://www.nauticexpo.com/prod/quicksilver-parts-accessories/product-50522-395939.html
Mercruiser makes one. I put it on my 8.1s and get all kinds of data on the MFD's.
Email the guy's captain: Capt. Glenn Bregman <captglenn.bregman@gmail.com>
He moved up to a 60DA. Boat has been kept up. Made several trips up as far as Nantucket/Martha's Vineyard.