I connected the heater hose from the muffler heater outlet to the cabin heater box. My muffler heater outlet appears to be in the incorrect position.( Early addition ) The hose would be better going straight forward, but it would interfere with the nose wheel steering. I tried to find a 90* adaptor but was unsuccessful, the best option was to use the supplied heater hose which bends quite well around a tight radius. I also tried to use P-Clips to secure the hose, however too many angles and the best result was to use thick cable ties.