You may try this SQL statement
select m.mpfriendlyname, was.parameters_GUID, was.displayname from
managementpack m inner join discovery d on
m.managementpackid = d.managementpackid inner join
discoverysource ds on ds.discoveryruleid=d.discoveryid inner join
discoverysourcetotypedmanagedentity ds2 on ds2.discoverysourceid=ds.discoverysourceid
inner join MT_Microsoft$SystemCenter$webApplicationSolutions$singleURLTest was
on was.basemanagedentityid=ds2.typedmanagedentityid where m.mpfriendlyname='Test Management Pack'
The URLs entity is stored in the parameters_GUID and you should find out the value of GUID in your operations manager DB.
Roger