Translations:Lampe solaire à batteries lithium récupérées/173/en

• Weld the red wire (positive) with the IN+ input of the charge regulator and the black wire (negative) with the IN- input (image 5).

If you are a beginner, you can go to this how-to, which explains the principles of the welding's basics : https://www.youtube.com/watch?v=8oGjG9uyYq8.