The 22-year-old has impressed for the Brazilians of late, scoring the winner against Free State Stars on Sunday in a man-of-the-match display at James Motlatsi Stadium.
Mosimane has put faith in Madisha following his performances in the MultiChoice Diski Challenge, which serves as a reserve league to the topflight.
Downs won the MDC title and consequently earned a trip to Holland as a prize.
"I have triggered the hunger in Madisha, already you don’t know the internal stuff that is happening," said Mosimane.
"I kept him in the deep freezer also he was coming and dribbling and I kept him in the deep freezer. I sent him to MDC and said until you play well in the MDC then you gonna come here. Your ticket to Sundowns is the MDC. He was captain and showed leadership.
"He came to me and says, 'coach can I go to Holland on the trip?' I said, 'go and play in Europe and see what you can do,' and he brought a trophy from there. I am very happy. I told him he must not forget where he comes from. He is young, he is gonna make mistakes. We need to give room for mistakes but yeah he is a good boy."