In the canteen of the detention center, the service auxiliary police are usually responsible for the supply and management of meals in the canteen. Their main responsibilities include but are not limited to the following aspects:

1. Meal preparation: The service auxiliary police are responsible for the meal preparation in the canteen, including dish preparation, cooking and setting.

2. Meal supply: The service auxiliary police are responsible for providing cooked food for the detainees in the detention center to ensure that they get nutritious meals on time.

3. Food safety and hygiene: The service auxiliary police should strictly abide by the food safety and hygiene regulations to ensure the food quality and hygiene.

4. Canteen management: The service auxiliary police need to manage the use and maintenance of the canteen to ensure the hygiene and order of the dining area.

In addition, the service auxiliary police may also undertake some other duties related to the canteen, such as helping to make recipes and monitoring food inventory. It should be noted that due to the different scale and management system of detention centers in different places, the specific work arrangements may be different. The above answers are based on the general situation, and the specific situation may vary from region to region and institution.