I contacted the OEM, and they let me trade in the manifolds for more of the swivel mounts, which CAN be stuck directly into each cell cap; but require more custom-cut tubing between cells instead of the pre-fab manifolds. For people with no vertical clearance, or working around hold-dowms and cabling, this is a great way to go... Next time I think I would order only the individual swivels and NOT the pre-fab manifolds.