I don't have a diagram but the solenoid should have 3 ports. One goes to the compressor housing port on the turbo, one goes to the wastegate vacuum port, and one goes to a manifold vacuum source. It's important to get these right, is your solenoid separate from your pressure sensor? The pressure sensor would be the manifold vacuum source in that case and the other two go to the solenoid. I hid my solenoid under my IC pipes =) But I think the Apexi one is taller and narrower than the HKS one.