The winning goal was scored by Macaiabo, in added time, at 90+6, at the Tundavala stadium, in the province of Huila.
The two teams will face each other again in a week's time, in Congolese territory, in the second leg.
Bravos do Maquis won this Sunday against Congolese side FC Saint-Éloi Lupopo by 1-0, in the first leg of the last qualifying round for the group stage of the CAF Confederations Cup.
The winning goal was scored by Macaiabo, in added time, at 90+6, at the Tundavala stadium, in the province of Huila.
The two teams will face each other again in a week's time, in Congolese territory, in the second leg.