This fiber optic cable attaches to the back of the Laser Ranging Telescope at the end of the High Gain Antenna boom. It actually has three segments that connect to each other. The first two segments are used to transfer the lights from the back of the telescope to the bottom of the boom. The third segment is used to transfer the light from the bottom of the boom to the LOLA instrument. This cable was carefully handmade at NASA's Goddard Space Flight Center in Greenbelt, MD.