How to opened and locked TCMT's saddlebags

First, When the saddlebags are used, the notch of the lock should point at this Angle.

Second, When the notch of the lock is pointed correctly, it can be locked correctly. When locking, make sure to press all the way down, not halfway down.

Third, After the saddlebags are locked correctly, insert the key, lock it clockwise, and pull out the key.