Okello will be in charge of Al Ahly (Egypt) v Horoya AC (Guinea) next week.
"We are trying to test our attacking formations that can produce more goals."
The Crested Cranes beat Swaziland 4-3 in their opening game in South Africa. Next up, they face Namibia on Saturday.
The 20-year-old forward impressed for the Three Lions over the international break.
The first leg of the match takes place in Rwanda's capital, Kigali.
Sterling and City's hierarchy spent much of last season in contract negotiations.
Muhoozi takes over from Josephine Namukisa.
Jjuuko is suspended for second yellow card.
Express FC fans have for years been accused of violence during league games.
The former Vipers custodian left the country on Monday.
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