take two Lynx Distributor. Check out my system thread about EF3 fuses and open-source fuse monitoring by Thomas.
I would connect each battery to one Lynx port.
You could parallel two batteries. You would need at least two positive and two negative wires from battery to Lynx, as the Aphenol-plus do not serve more than 100A.
Plan one DC switch between battery Lynx and other Lynx or one for each battery.