3 x 3 foundation with container and overflow output. Has input and output ports, with an internal overflow container. Gathered overflow can be used from the back output port. Access door is on the front right. In the photos you can see how I chain them together. In larger areas I will use one to receive batteries and distribute them when a battery plant isn't close. In this example I have a battery plant (as seen in picture 2). I provided an example how I encased a single receiver port. There is an additional blue print for Shipping Drone Port. The main difference is the configuration of the input and outputs.

Shipping Drone Port Blueprint https://satisfactory-calculator.com/en/blueprints/edit/index/id/4228/name/Shipping+Drone+Port