I currently own an RV6 and want to install the ap74 ,roll and pitch servos. The airplane has a D10a installed and a Garmin 150xl in the panel. The previous owner didn't network the Garmin to the D10A. I want the autopilot to accept Gps commands from the Garmin and I'm not sure about networking it to the AP74 ,or the D10a,or both...is there a harness available for the installation? I'm ready to order the components and I want order everything needed at one time..thanks