If you don't want to install the tender directly on the battery, this is a solution for you.
Get it at Revzilla:
http://www.revzilla.com/motorcycle/tecmate-ducati-to-sae-adapter-cable
Of course Ducati makes their own but look at that price tag!
Ducati Battery Charger ($81) - http://store.ducatiusa.com/p/ducati-battery-maintainer