Any boost controller is installed between the wastegate actuator and pressure source (compressor or intake manifold)
For the AVC-R, NO goes to the compressor side and COM goes to the wastegate side.
Do a research on how boost controlling and wastegate work first.
If you understand how things work, you will know how to hook up any boost controller.
http://www.streetracersonline.com/ar.../wastegate.php
http://www.streetracersonline.com/ar.../boostctrl.php
Also, you can also download the manual from Apexi website.
The installation instruction is on page 39.