I cannot make sense of those pictures but the piggy back set up is very simple. You take the fitting coming out of your factory hard tank and replace with a 90 degree fitting then route that hose into the bottom input on your bag with a straight fitting for filling with overflow from factory hard tank. You then take one or two of the inputs on top of your bag and 90 degree fittings, connect this hose to where your original thru hull overflow to the side of the boat went.
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