HI
SLD is shipped with your solman system only, (Netweaver).
http://<SID>.sap.<Domain>.com:PORT/sld
In that solman setup, Along with other SLDs, you must choose the sld which is being data supplier for your solman sld, usually PI SLD will be used but it totally depends on client how they setup and what SLD they use as central SLD sometimes I had seen clients have independent SLD implementations .on Netweaver systems.
Thanks
Rishav