holes from larger gears should both be showing as illustrated by the red circles . (The large gears are under the frame and driven by the smaller gears.)
18.With the above in alignment, install the main drive assembly. Start at the left side, inserting the MDA into the metal slots and rotate it into position. Place a screw in the upper right corner of the MDA to help keep it in place if the MDA doesn?t fit flush when first installing it. This gives access with both hands to "jiggle" it into place.
19. Make sure the clips are pushed in and the MDA is seated properly.