Make sure the key hole is rotated to the position as shown above.
Keep the cross hole at the bottom edge of the latch, so the flat shaft can pass through.
Note the direction of the panel with the text side facing the door.
Align the red wire side of the flat cable to the right of the connector. Then insert the flat cable into the connector.
Align the red dot (under the slot hole) to the arrow edge, so the slot hole can maintain the horizontal position.
Place four AA batteries to complete hardware installation.
(Note the polarity direction to avoid damage to electronic parts.)
If you have any problems installing XenLock - Android smart lock, please feel free to contact brilong service team