3 port boost controller solenoid help

[russ78]

recently got a HDI boost controller but it comes with a 3 port solenoid I have a pretty good idea that port 1 comes from the actuator and port 2 comes from the turbo (CT9 Hybrid) so does port 3 go to the back of the controller ? and how do you know what is the in and what is the out on the controller ?

[steve-gers]

last port vents to atmosphere.

[russ78]

so can I tee off my boost gauge hose ? and also whats in and whats out on the solenoid

[steve-gers]

Yeah you can tee off that. are they marked com nc and no or similar?

[russ78]

no theres nothing on em, what happens if they get put round the wrong way ?

[russ78]

anyone have any ideas ? I think turbo side is the single port but what one vents ?