To use this K - Tuned AN to ORB adapter, first, make sure your ports are clean. Then, connect the female AN port to the end with the O - ring, and the male AN part to the other end. When installing, be gentle to avoid damaging the O - ring. As for maintenance, regularly check the O - ring for wear and tear. If it looks damaged, replace it right away. Also, keep the adapter clean to ensure a long service life.