basically - on my 748/853 - I drilled two holes and fabrictaed an aluminium post to hold the reservoirs on the Top Yoke.
www.khushy.com/748.jpg On my 999s I have gone a slightly different (tidier & oem look) route as you can see from these pics - the end of the handle bar is left open - no plug - I then bought two bar end mirrors from Motrax - removed the mirrors (keeping all the brackets) and then mounted 2 reservoirs which are the same size as the rear brake reservoir(cant understand why you need such a big reservoir as the standard one anyway) and bingo - looks really good - no mess no fuss and most importantly - ITS FULLY ADJUSTABLE - cause you know how important that is to us Ducati owners!!!!
LOL!
www.khushy.com/999a.jpg www.khushy.com/999b.jpg Hope this helps!
Khushy
here is an idead . . . 
Threaded Mode