Despite being a key figure for the team, captain Olunga is doubtful for the high-stakes clash due to a thigh injury.
Harambee Stars are hoping to bounce back from a heavy 4-1 defeat in the first leg, where Olunga scored the team's only goal.
The defeat was a significant blow to the Harambee Stars' AFCON qualification hopes, but Olunga remains optimistic.
He has encouraged his teammates to learn from their mistakes and approach the rematch with renewed determination.
As Kenya prepares for the second leg, Olunga's leadership and experience remain vital, even if he is unable to take the field.
His message to the squad is clear: focus on the task at hand and strive for a much-needed victory to keep their qualification hopes alive.
"Of course we know the opponent, how we played in the last two days. It was not an easy game for us, but of course we have to learn from the first leg fixture," said Olunga.
"We want to rectify our mistakes, and we want to come out and really play the real football that Kenya deserves. So we just want to come here with a positive mind, we want to start strong the game.
"The last fixture we didn't start strong, but we want to try and contain our opponents and try to get positive results.
"Well of course, it's a strong team, you can see all the departments, they are very strong, but I believe this is football, and like I say, in the last fixture we made a lot of mistakes."
Kenyan footballer and former New Mathare FC goalkeeper Eric Wafula, popularly known as Jagoal or Norlan, was tragically killed in a mob justice incident over the weekend in Pangani, Nairobi.
Benni McCarthy is still waiting for his first win with Kenya after guiding his side to a goalless draw with Chad on Saturday.
Kenya national team assistant coach Anthony 'Modo' Kimani has confirmed that the Harambee Stars are actively scouting for new talent to bolster their depth ahead of the upcoming African Nations Championship (CHAN).
Kenya's national football team, Harambee Stars, is at a pivotal crossroads as head coach Benni McCarthy faces increasing pressure to lay the foundation for the country's footballing future.
