Letuka, who played for Usuthu in the Uthungulu Mayoral Cup in Richards Bay on the weekend, will help ease the departure of Marc van Heerden to Chippa United.
"Letuka, we signed him yesterday," club general manager Lunga Sokhela tells snl24.com/kickoff.
"We have released Bornwell and he has gone back to Zambia," Sokhlela adds. "We came to a settlement so he's free to join any club of his choice."
The National First Division side are still assessing ex-Orlando Pirates defender Kyle Davis, having recently brought back veteran hitman Mabhuti Khenyeza.