Methods as below:
1. Use a flat-blade metal tool to align with the opening of the "E"-shaped buckle at the end of the lock core, and push out the "E"-shaped buckle;
2. Take out the locking piece;
3. Put the lock core through the outside of the tail box (lock plate). The lock shell is made of plastic and needs to be stuck in the fixed position. If it is metal, the nut needs to be tightened;
4. Install the locking plate in the correct direction;
5. Install the "E" shaped buckle.
