In last lesson, we’ve learned how to solder GPIO pins on Raspberry Pi Zero or Zero W. Raspberry Pi Zero/W's factory default condition is without GPIO pin. Before using GPIO pins or install HAT or topper on Pi zero or Zero W, you need to solder pins.
40 Pin Header x1
Raspberry Zero/W board x1
Solder iron x1（self-prepare）
Solder wire x1（self-prepare）
Insert 40pins header to Pi Zero / W, and the short pins through the board.
Warm solder iron，solder pins at the back of Pi zero / W