I have a 24v system comprising:

4x12v 135amp Domestic batteries.

They are connected as 2 pairs of batteries wired in parallel to give a 2 x
24v and then the 2 pairs are connected in series.

2x12v engine starter batteries connected in series

My question. when I connect these to the boat, should I take the positive
and negatives feeds from the same battery/ battery pair or one from each?
Does it matter?'