Maritzburg confirmed Xulu's capture on a three-year deal on Thursday along with the signings of Rushine De Reuck, Motsie Matima, Mxolisi Kunene, Liam Youlley, Richard Ofori and Jethren Barr.
Xulu was released by Chiefs at the end of last season after barely featuring in two years with the Soweto giants. He initially penned a five-year contract with Amakhosi following spells with FC Rostov in Russia and Mamelodi Sundowns.
Xulu, whose arrival at the Team of Choice offsets the recent departure of fellow defender Themba Shabalala, is yet to train with the team which is currently preparing for next Sunday's MTN8 quarter-final with Sundowns at Lucas Moripe Stadium.
"Siyanda Xulu is a huge signing for us and will give us the necessary experience in defence and of course the quality in the defensive department, especially after losing the experience of Themba Shabalala," Davids told a press conference.
"He'll be able to give us that experience in that department. But of course from my side, as the coach, we need the support of the board and the support of the chairman, and that has been one hundred percent in trying to first of all allow players to move on and bring in new players.
"It really shows the great intent from the club as the chairman has spoken about the top five. This shows real intention in bringing players of Siyanda's calibre and magnitude to the club. With him only being 25 years of age we feel he'll be at the club for years to come."
Davids added that the club plans to make two more signings before the season starts.