autopilot installation

After searching for several days, I was unable to find any suggestions for installing a rudder reference transducer on my Hunter Vision 36. The boat has a large circular steering quadrant and no place below decks to install a rudder reference transducer so I had to improvise.

I own a Hunter 336 sailboat. I have a Raymarine EV-100 Wheel Pilot brand new in box and have had it for 3 years...never installed. I would like to install it myself but do not know what I need to do inside the pedestal. I've searched You Tube and found only limited detailed video of this done...