Hi Mike,
The best source about balance I know is below.
This is what is balanced and best for twin twelve volt batteries.

As it often doesn't cost a dime more to do this, I think it is worth the trouble.
If you wish to understand the "why" surf here:
correctly interconnecting multiple twelve volt batteriesOthers may say it doesn't matter--but unless there is a compelling reason to not optimize charging and discharging why not do it the best possible way?
Here is a video of 3 twelve volt batteries that have been wired in an unbalanced manner for 2 years. They have been equalized. The test shows how CCA has been adversely affected.
unbalanced for 2 years23mikey wrote:
GordonThree - I am installing a Magnum Inverter, the Hybrid. I haven't seen in the install manual Magnum talks about balance. Could you point me to where it might be? On their website maybe?
Mike