TiltMotorFrontLeft (75) and TiltMotorFrontRight (76) are correct for the tilts. Throttle left (73) and Throttle right (74) for the motors.
Q_ENABLE 1
Q_FRAME_CLASS 10
Q_TILT_ENABLE 1
Q_TILT_TYPE 3
I would expect that to work, although as your finding this is not a very widely used type.