VST-preset browser for 3rd party VST's?

I’ve used the Plug-in Manager to add VST 2 Plug-in Paths to 3rd-party VST’s, like Kontakt. That works fine, I’m able to use the 3rd-party VST’s in my Cubase projects.

When I’m doing “Add Instrument Track…”, there’s a “Browse” button, that opens a browser that shows Steinberg VST’s, but not my 3rd party VST’s. I’ve investigated the “Location Tree”, but still haven’t found any way to add my 3rd-party VST’s to be included in the browser? How can I add them to the browser?