Solder Connector to the solar panel try to center the wires and be careful these wires are tiny!
Add the solar panel shims and the Kapton Tape. Use the tape to keep the wires in the channel
Place the battery in and route the wires. The wires I used was just barely long enough, so it will be tight. Make sure to connect the wires accordingly it is labeled on the PCB
Done! Some bright sunlight and everything should be great!