mafia in MTL doesn't have a boss and underboss administration/hierarchy presently like those in u.s. mafia.
maybe in years 1999-2006 it may have had a similar structure to families in u.s. but after the Rizzutos 2006 mass arrests and decades long war no such structure exists.
if Leonardo is boss it would make S.Sollecito street boss in same role his father held for Vito.
members/associates work directly for these 2 top leaders.at this time there are no capo positions there are cell leaders in charge of small groups for specific crimes and territories.