You are not going to be able to merge these two profiles, because the one has privacy settings. You will have to open up the settings or become manager of both profiles. You will probably get a default approval after 30 days because the other manager has not been around for a few years. As I said, correct the situation with the privacy now or you might trigger another 30 days wait when this 30 days are up.
Always merge into the lower number if the LNAB is the same, else if different, merge into the correct LNAB, irrespective of what the number is.
PS Please remember to add at least the country tag, and/or the South_African_Roots tag to your question as well.