Lwandamina has barred his players from celebrating after beating the Absa Premier League side in the first leg in Ndola.
The Zesco says the duel is far from over after Khama Billiat scored a late away goal to give the Brazilians a life line.
“Our mission is simple, we want to advance to the next stage of the competition,” he told MTNFootball.com.
“My players are not too excited because they are aware the job is not done yet. Celebrating is useless at this stage because we still have to go to Pretoria for the second leg.
“In these competitions, one must be wise and remain calm because things can change there (in Pretoria). The business continues and we can’t be carried away.
“Yes we did well to win, but my players are professionals, they take their job seriously as we prepare for the second leg.
“Having said that, the mood is great in our camp and we will have to remain committed.”
The coach has named a strong squad to face Pitso Mosimane’s chargers at the Lucas Moripe Stadium on Saturday night, with brace hero Jackson Mwanza leading the list of players that will depart from Lusaka for South Africa this week.
Zesco also welcome back star midfielder Clatous Chama after missing two Caf champions League tie due to suspension.
Jacob Banda, Lameck Nyangu, Brown Nyirenda
Ben Adama Banh, David Owino Odhiambo, Simon Silwimba, Daut Musekwa, Bernard Mapili, Ayo Oluwafemi,
Anthony Akumu Agay, Misheck Chaila, Clatous Chota Chama, John Chingandu, Kondwani Mtonga, Maybin Mwaba, Mwelwa Mwape
Jesse Jackson Were, Jackson Mwanza, Idris Ilunga Mbombo, Lazarous Kambole