Méthode de vidange circuit de refroidissement

How to drain the engine coolant here on a Peugeot 207 after changing the complete timing belt kit. List of tools used or equivalent: Knipex Cobra pliers: https://amzn.to/2J4A6Ic Peugeot Citroën coolant: https://amzn.to/33Dcl3B Drain pan: https://amzn.to/3b9AMs0