THIS IS THE BLACK & WHITE FULLY SCREEN/FILTERED IMAGE. THE MASK OVER LAY JPL/NASSA PLACES OVER THE IMAGE DISTORTS EVERY  PIXEL THIS MECHANICAL UNIT LOOKS TO HAVE A CHAIN DRIVE GEAR BOX JUST UNDER
THE MAIN PLATE. THERE SEEMS TO BE A TRACK OR CHAIN RUNNING JUST UNDER A THREE PRONG MECHANICAL CONNECTOR. THE HOLE LOOKS LIKE ELECTRICAL MOTOR HOUSING WITH OUT IT'S ARMATURE. THERE A LOT PARTS SCATTERED ABOUT, HOWEVER THE MASKING SCREEN WHICH WAS PLACE OVER THE IMAGE, MAKE ABSOLUTE DETAILS IMPOSSIBLE.  
NASA/JPL HAS DONE A GOOD JOB TRYING TO HIDE THE MACHINERY WITH THE SCREEN OVER LAY.