Hello Emir,
These all things are related to Basis. Please ask your basis team to look into this. Regarding Central SLD or Local SLD, it depends on your landscape. Usuall for production system a Local SLD is used and for Development and Quality system a single central SLD is used.
There are scenarios, where SOLMAN system is used as Central SLD. Please check with your Basis team on this and do the configuration accordingly.
Regards,
Nitin