I am ready to install new batteries. I have not found a reference for wire
size - between - batteries. I have six T105 six volt batteries. What size
wire should be used to series and parallel them? The boat has 2/0 with a
250amp fuse running to the battery selector switch. I am not sure how much
my started draws (Perkins 4-108) but I would like to size to start from
either the starting or house batteries or both. One more thing that does not
look right is that the Neg wire on the starting battery is size one or two
connected to the house bank Neg only. Shouldn't there be a jumbo size wire
directly to the engine block at the starter?

Thanks as always. I couldn't have come this far without you folks.
- Allen