In the early 22nd century, a laser station has been established on Uranus' moon, Cordelia to shoot chunks of frozen deuterium into the inner solar system for fusion fuel. However, the single laser also needs a relay in case Earth is behind the Sun or otherwise inaccessible. This relay station needs to generate a laser beam to redirect and decelerate the small chunks of deuterium payload either to arrive at the station or to be redirected towards Earth. For maximum angular separation from the Sun and Earth as seen from Uranus, this will be positioned somewhere in the Saturn system.
Now, to get to the meat of the question. Where exactly should I put it? The surface and in-orbit options on the airless moons of Saturn both have their advantages and disadvantages, but I wonder which one is actually superior in terms of designing as efficient and light station as possible.
TL;DR: Factors to consider are 1) mass of station with cooling equipment, any thrusters, etc. and 2) optimum position for relay of energy.
Thank you for your input!