Manzini joins Ghanaian midfielder Mumuni Abubakar among the club's new signings this season having joined from Summerfield Dynamos.
The KwaMhlangu-based side will be making their first appearance in the Motsepe Foundation League this weekend after buying the status of Free State Stars.
Castric Stars boss, Bucks Mthombeni has confirmed that he has also retained the services of Paulos Masehe as part of the technical team.
"Yes almost 95% of players that are here have signed," said Mthombeni after watching his team play against Sekhukhune United in a friendly match in Tshwane on Saturday.
"Masehe is also part of our technical team. We also have Thabo Nthethe as part of our technical team," he added.