should the batteries be coupled?

[username]

this is probably a dumb questions, but anyways.
i was just looking at my batteries and noticed the negative terminals are coupled and the positive ones are not. am i missing a wire here or is that the way it's supposed to be?

[Green1]

I'd say look more closely... the positive terminals are almost definitely coupled.

[username]

mine are not. i guess i should invest in a good piece of wire...

[joostio]

I went to a single starting battery and an isolated rv batt, starts good on the single batt, I just made sure it had some high cranking amps. an rv battis nice to have too, can safley run the sterio with no worries about starting.