Thought this might help some of those who have questions regarding your plugs needed or not needed in the multiple ports on the TiAl wastegates. Of course depending on whether you are running a manual or electronic boost controller or none determines it all, but they give you several points of install for your fittings including water cooling ports as well.
Two key things to remember: If you are not using a boost controller, both “upper” ports are left open. In this scenario then, you would have 1 of the 3 lower “air” ports used for a vacuum source and the other two would be plugged/capped off. If you are not using the “H2O” lower ports, leave them open as well.