the KLIK FIX fitting, works extremely well, but it is dependent on the wire that slips under the stem for support
...and Bosch bikes do the need the extension fitting
Rixen & Kaul, KLICKfix Adaptersysteme Fahrradzubehör, Solingen, Taschen, Körbe, Werkzeug
to allow the speedo/control unit to fit back on the handle bars
the fitting will support Altura, and Ortlieb bags, and probably KTMs own ones too, as it seems to be the 'euro' accepted fittings
having said that, I/we have just come back from a bike tour round Puglia, (on un powered bikes!), and the bar bag fitting the company provide does not have the wire support, and is serious flimsy
cheers barry