Does the highest hole in a hillside distribution box need to be connected to the inlet pipe?

In a hillside distribution box, the primary function is to manage and distribute the flow of effluent from the septic tank to various drainage fields or leach lines. The highest hole in a hillside distribution box does not need to be connected to the inlet pipe because its purpose is to ensure that effluent can drain properly and avoid pooling or backing up in the system. Connecting the inlet pipe to the highest hole could lead to unnecessary complications in the drainage system, potentially causing flooding or overloading of the system. Instead, the inlet should be connected to the designated lower hole, which effectively allows for gravity-fed distribution of effluent to the appropriate leach fields based on the landscape's natural contours. This design is crucial for maintaining the functionality and effectiveness of the septic system as well as preventing any issues that may arise from improper connections.