Mount the clock on the wall first and allow the chains to hang down. Then, look at the chains and locate the weight hooks. Find the opposite end of each chain and pull it down so that the weight hook hangs approximately 3 inches (7.6 cm) from the bottom of the clock. Finally, carefully attach the weights to the hooks. If your cuckoo clock has three weights, the heaviest one goes farthest to the right (the other two should be the same weight).