the ECU pulses is the original feed from the ECU.

the way it works as standard is that the ECU pulses a signal to the valve making it "flap" open and closed really quick.

its up to you if you use a 3way switch or a 2 way switch and what connections you use, the thing is purely mechanical so wont break anything.

just remember when you add the value yuo will INCREASE the boost so you will need to adjust your actuator preload to make sure it's still hitting the same MAX boost.

also is your RST a special spec of any kind with special modifications to the fuel ECU to run loads of boost? if so you dont want to REDUCE the oost pressure.

if its a normal RS turbo with simply a chipped ECU and standard MFI setup it'll be fine