The pieces with the resistance strip come at both ends.
The untaped part comes in the middle of the rod.
Press the “buttons” at the ends and push them into the other rod. Then rotate the rod so that the buttons go into the holes in the other rod and you hear a click.
If the tape is too long or you need more resistance, twist the resistance tape around the rod until the tape length and resistance are right.
Note.
Twist the tape around the fixed part of the rod (not the rotating end).
To disassemble the rod, press the same buttons you pressed when you assembled the rod and pull the pieces apart.