Arturia Synths in Mainstage?

Hi,

just installed Mainstage and explored it a bit, but there's one thing I can't seem to find out and that's how to get my soft synths imported in Mainstage... When I check the "Audio Unit Manager", it shows that mainstage has succesfully detected my minimoog, jupiter and moog modular synth, but I can't select them anywhere in the patches/channel strips menus... I have these different menus (pianos, electric pianos, synthesizers,... and one seperate for Garage Band instruments) but, I'm just wondering: where are my Arturia Softsynths in that list?

Thanks,
S.