Boost Controllers don't need to be ECU linked. They generally only need power/earth and connections to the valve, just like you would connect a bleed valve. Also a map signal, which is connected just like you connect a boost gauge. Some have additional features which may need input signals to use all the functionality. The Profec-B isn't one that needs other stuff to make it work.

The AVC-R can display Injector Duty, RPM etc, so needs a wire for these.