The Ibrox chief executive met with three different supporters' on Thursday and informed them he was approached by King to set up their recent meeting in South Africa.
King is believed to have lost as much as £20m while Sir David Murray was chairman of the club following the club entering administration in 2012.
Despite reporting losses of £14.4m for the 13-month period until the end of June, the minutes from Thursday's meeting reveal Maher told the supporters' groups Rangers were not in need of King's cash immediately.
"I want Dave King on board for his historic knowledge of how the club works," Mather is quoted as saying. "I said we don't need his cash now. When we get back to the top flight and to compete in Europe then we would welcome an inflow of cash."
Rangers face a hearing at the Court of Session on Monday to determine whether their annual general meeting can go ahead as planned on October 24.
The legal challenge was lodged by a group of shareholders unhappy about a motion calling for the appointment of former chairman Malcolm Murray, ex-Blue Knight Paul Murray and businessmen Scott Murdoch and Alex Wilson to the board.
Mather revealed he is concerned about speculation and rumours that are undermining his efforts to provide stability to Rangers.
"We have to do things legally and properly," Mather said. "I'm happy to add to the dynamic on the board. Dave King rang me and I was happy to meet and talk - I'm only interested in the future, not past events.
"DK is not part of any team or conspiracy - he's an individual who cares about Rangers. We had two days of very positive discussions with him and working with the existing team.
"I am concerned about lies being told about people on the board. I want voting at the AGM based on fact - 99 per cent of why we are in court is purely from the legal aspect."