1. First, there is a protrusion on the right. Insert a flat screwdriver into the edge of the OBD from the back and bend it slightly.

2. Secondly, let the protrusion pass through the outside of the OBD. Push it in gently and the OBD will come down.

3. Finally, the pin can be quickly installed by cooperating with the pin loading fixture, and the pin can be quickly removed by putting the inner core into the second through hole and cooperating with the pin pulling fixture.