In the story of Ratanji, how did Das Ganu know Gajanan Maharaj?

The provided source material from chapter 14 does not establish any connection between Das Ganu and Gajanan Maharaj. The text states that the Parsi merchant Ratanji had great faith in Das Ganu and confided in him about his desire for a son. In response, Das Ganu advised Ratanji to seek the blessings of Sai Baba in Shirdi. The narrative details Das Ganu's instruction to "Go to Shirdi; you will obtain your heart's desire" and to surrender to Sai Baba. Gajanan Maharaj is not mentioned in this interaction or in the provided excerpts at all.