Hi and welcome to Arturia forums.
When you say "placed", then do you mean "installed"? I suggest you install the plugins into the correct folders. That will also make it easier, when you update.
If you don't mean "installed", then which plugin have you placed where? Perhaps it's the wrong one.
Are you sure, that the other plugins in the folder being read by Cubase, and it's not other versions you see in Cubase?
But anyway - then i suggest you install the plugins to the correct folders, so you don't have to move/ place anything after that, if that's what you have done. It's not recommended to move things from the install path, no matter which software you use.
Analog Lab should show up in a DAW, if the DAW can read third party plugins, and things a installed correct, and the DAW is set to read the correct paths.