To Know: Red wire is positive (+), black wire is (-)
Tip: Fold the wire back to make it thicker, so more of the wire is touching the solar panel, for better surface connectivity.
Tip: Wires must firmly and securely touch the surface of the +/- points!! You can use several pieces of tape to improve it. The stronger the connection between panel and wires, the more stable the circuit.
After you confirm your connection is good, it is time to secure the wires to the back of the solar panel.
If the USB light is on, but your power bank is not charging, you might need a stronger light source. Bring the solar panel outside or set in DIRECT sunlight