I removed the weights and pendulum in order to move the clock. While reassembling, the middle chain dropped out. Do I install the chain so the weight is hanging on the left or right side of the sprocket wheel? Also, the left and right chains each have 2 holes through the horizontal wood piece. The center chain only has one hole. So when I reinstall the center chain, entry to the sprocket wheel and exit from it is through the single hole?