yesh it was on the tablet. madaras true dream he was talking about to hashi before they started fighting at vote was mtKaguya was not involved anywhere until he opened his 3rd eye. I am damn sure that the way to bring back jyuubi and the method to cast mugen tsukiyomi was not written on uchiha stone tablet. Madara has learnt about it somewhere else (after end of valley fight).
trueWell summed up, but you did not mention the puppet curse seal from 675, page 8. Still, it fits with your summary since that could be the mechanism by which Madara controlled obito via chakra.