The 24-year-old, who played at the recent COSAFA Cup, penned a three-year deal with Dikwena from Buffaloes FC on Tuesday.
Mwila will compete for game-time in Rustenburg with the likes of fellow recruit Maboke Matlakala, Benson Shilongo, Katlego Khunou and Thobani Kunene.
"This is a very good signing for us," Mazingiza told the club's website. "We have always wanted to sign a striker so we are excited to have him at the club. There were other clubs that were after him but I think we moved faster. He was always interested in joining us because of the brand. He will add value to our club."
Stars have also added Lehlogonolo Masalesa, Sibusiso Mthethwa, Luvolwethu Mpeta and Enocent Mkhabela to their roster as they seek to improve on the side's disappointing ninth-placed finish in the league last term.
Mazingiza believes new head coach Peter Butler, brought in as a replacement for Cavin Johnson, has the players to match management's expectations.
"We are building a team. The puzzle is coming together very nicely. We set ourselves to get certain players and I can say that 90 percent is done already so it’s up to the coach and his technical team to create a system and a strategy because the personnel is there. It’s our way to say we support the coach and to say as Platinum Stars we are serious about our business. We are just looking forward to a better season ahead."
Butler's charges will open their 2017/18 Premiership campaign against Maritzburg United at Royal Bafokeng Stadium on August 20 (15h00).