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Here is a pic of the wastegate solenoid mounted to the front of the spider. It will be horizontal like in this pic or vertical depending on model year. You can see the red pressure line. Follow it up to the can on top of the turbo. That can is the wastegate actuator. When you pull it off stick it on one of the t-bolt clamp bolts so you do not cause a boost leak.
Here is another pic and some wastegate solenoid info.