Barrel Connector Concentricity

Hello, this was for an interview question and I couldn’t hack it.

Picture an enclosure with input and output terminals and there are 3 barrel connectors. Explain how we make the barrels concentric and ensure robust hardware assembly between the board with the connectors and the enclosure. Forget gd&t, since there will always be variation, we want a perfect fit. What are some of the aspects of aligning the holes and maintaining the concentricity requirement?