What were the roles of Kaka and Babasaheb Tarkhad during the incident with Boss Dharamsee's visit?

In the account from Chapter 35, both Kaka and Babasaheb Tarkhad played important roles. Kaka, following the principle that one should not visit a Guru empty-handed, was the one who bought and offered the grapes, thus setting the stage for the entire event. Babasaheb Tarkhad, another devotee present at the mosque, served as an initial point of contact for the skeptical Boss Dharamsee. When Dharamsee asked why people come to Shirdi, Tarkhad simply replied, 'For Darshan,' and noted that one's desires reach fulfillment there. Later, Tarkhad served as a crucial point of comparison; when asked, he confirmed his grapes had seeds, which made Dharamsee realize the miracle of the seedless grapes was performed specifically for him, deepening his astonishment and faith.