not an LST expert but I think you should bend the top away from the light if you want the plant to focus on the lower nodes. My plant didnt start focusing energy on the lower nodes until they were the closer ones to the light. The plant will naturally seek out light if you want those tied down nodes to be the ones growing larger you should tie the main stem down toward where the pictures were taken from. If the main cola continues to get an optimum amount of light it may just negate the fact the lower nodes are tied and continue to grow the main cola towards the light. Im a beginner at LST as well and this is just my basic understanding. If you look at my plant I turned the main cola away from the light until the lower growth started extending towards it then turned it back once it stretched.
which gave me another whole arm that has a growth point on it.