I'm putting my 3.0L 225hp EFI powerheads on Optimax Mids and noticed that the Opti's mids have two extra ports, drilled/tapped, on the port side of the adapter plate that were not on the EFI mids. They look like they're just extra water fittings, but I want to be sure that I can plug them off without a problem. Can anyone verify what these extra ports are for? Your help is greatly appreciated.