Re: Electrical system install
Use the terminal with a nut. Stack the terminals as you will only have 2 or 3 including bilge pump probably - up to 4 is considered ok. I like to keep it to one connection per post, going to a bus and from there branching out, but it is necessary on larger boats with more connections.
The other solution is to put the connections on a powerpost like below and run only one to each battery. They aren't very expensive and you only need a 1/4" one.
Living aboard in Victoria Harbour