Malaysian Anti-Corruption Commission (MACC) had previously said Kasitah was a recipient of these funds, with the government trying to retrieve them.
Najib is suing her over the management of accounts under his name, which were used to divert funds from SRC.
Najib was put on the witness stand in December last year where he read out an almost-300-page witness statement detailing his defence against charges levelled against him for criminal breach of trust, abuse of power and money laundering involving RM42 million from SRC which wound up in his personal accounts.
Najib had said it was not prudent for him to check with them about the US$620 million left of the "donation" he had returned as "he knew" that Jho Low was the middleman.
Najib's admission came as deputy public prosecutor Datuk V Sithambaram was conducting his cross-examination on the former prime minister in the SRC trial at the High Court.
Responding to questions from ad hoc prosecutor Datuk V Sithambaram, Najib testified today that he contacted Wan Abdul Aziz to tell him to issue a letter requesting KWAP to disburse the loan to the former unit of 1Malaysia Development Bhd (1MDB) even before the cabinet had approved the government guarantee for the RM2 billion loan.
Najib, who was answering questions put forward to him by ad hoc prosecutor Datuk V Sithambaram, said the second government guarantee was approved by the cabinet and endorsed by him because he had an indication that SRC was making inroads into multiple renewable energy investments.
The trial began this morning by hearing from both the prosecution and the defence for the better part of three-and-a-half hours before the court adjourned for lunch.
Najib's counsel Harvinderjit Singh argued that the documents have yet to be conclusively determined and it is the onus of the prosecution to call an expert to verify the documents.
"With humility, I wish to state that I do not need the RM2 million money for myself. Before I joined the Cabinet in 2001 upon the request of the then prime minister, I was a successful businessman. I was involved in various businesses, namely real estate, logging, manufacturing, trading, agricultural, hotel, livestock and food businesses."