Manguxi and Tony initialled Petro's goals, while Lula and Gaspar secured the goals that qualified the Sagrada for the quarter-finals of the competition.
The teams had drawn 1-1 in the first round in Lunda Norte province, east of the country.
In the quarter-finals of the Angolan Cup in football, the 'diamond players' measure strength with Desportivo da Huíla, the 1.º de Agosto, winner of the title, faces Académica do Lobito and Williet de Benguela faces Bravos do Maquis.
Still at this stage, Interclube will face the winner of the match between Santa Rita de Cássia and Sporting de Benguela.
The Angolan Cup is the second biggest football competition in the country after Girabola.
