Step 1: Prepare the tracks and parts as per the above picture.

Step 2: Connect 2 "J" tracks together.

Step 3: Connect another “J” track to the previous 2 “J” tracks as per photo above.

Step 4: Recognize the design & direction of track "K" as per the picture above.
(Take note: There are 3 holes on the edge and the zigzag engraving on the
surface of convex track as per the photo shown above.)