For LiFePO4 batteries, my preference is to not run any cables between them. Each battery should have equal access to the rest of the system.
The way you have it wired, if the battery on the left reaches a high voltage disconnect level first, then the charge to the second battery is cut off by the BMS. This could leave your second battery always at a lower state of charge than the first battery.
The way you have it wired, if the battery on the left reaches a high voltage disconnect level first, then the charge to the second battery is cut off by the BMS. This could leave your second battery always at a lower state of charge than the first battery.