How does Daniel connect the writing with Baltasar’s conduct?

Baltasar holds a feast for a thousand nobles, each drinking according to age. Drunk, he orders the gold and silver vessels taken by Nabuchodonosor from Jerusalem's temple brought for himself, his nobles, wives and concubines. They drink wine from them and praise gods of gold, silver, brass, iron, wood and stone. The edition says Baltasar is believed to be Nabonydus, the last Chaldean king and Nabuchodonosor's grandson, explaining the scriptural title son as descendant.

In the same hour, fingers like those of a man's hand write on the palace wall opposite the candlestick; the king sees the writing hand's joints. His countenance changes, thoughts trouble him, loins loosen and knees knock. He summons wise men, Chaldeans and soothsayers, promising purple clothing, a gold neck-chain and third place in the kingdom to whoever reads and explains the writing. None can. The king and nobles are troubled.

The queen enters, reassuring him and recalling Daniel's knowledge, wisdom, dream interpretation and ability to resolve difficult things under Nabuchodonosor, who named him Baltassar and appointed him chief of the wise men. The edition identifies her as the king's mother. Daniel is summoned; the king asks whether he is the Judean captive and repeats the rewards. Daniel tells him to keep his gifts or give them to another, but agrees to read and interpret the writing.

Daniel recalls that God gave Nabuchodonosor greatness and dominion, so peoples feared him and he could kill, destroy, raise up or bring down whom he wished. Pride cost him throne and glory. Driven among wild asses, eating grass like an ox and wet with dew, he came to know God's rule. Baltasar knew these things yet failed to humble himself: he raised himself against heaven's Lord, drank from God's vessels and praised idols that cannot see, hear or feel, while failing to glorify the God holding his breath and ways. For this, Daniel says, God sent the writing hand.

The inscription is MANE, THECEL, PHARES. Mane means God has numbered and finished the kingdom; Thecel, that the king is weighed and found wanting; Phares, that his kingdom is divided and given to Medes and Persians. By the king's command, Daniel receives purple clothing and a gold chain and is proclaimed third man in the kingdom. Baltasar is slain that same night. Darius the Mede succeeds at sixty-two. The edition calls him Cyaxares, son of Astyages and Cyrus's uncle.