Newton's third law, when applied to the contact interaction during the docking of two space station modules, X X\,X and YYY, as shown in the diagram, can be stated as follows:
The force exerted by module X X\,X on module Y Y\,Y is equal in magnitude and opposite in direction to the force exerted by module Y Y\,Y on module XXX.
Explain how this statement links to the conservation of linear momentum for the two-module system during the docking process.