Pressure sensors for boost gauges don't have two vac lines running to them, and aren't called "wastegate solenoid". The wastegate solenoid controls the wastegate pressure signal in order to regulate boost pressure. It's what the ECU uses to go from an electrical signal to a pressure signal to control the boost pressure basically. You'll need a new one, or you can bypass it and get a manual boost controller. Don't just disconnect it and remove it though, or the ECU will throw a CEL.