I have just painted 2 packs of NRU10, Russian Dragoons 1808-1815

They have no scabbards, this seems odd, or have I missed something entirely (is it under the carbine or something?)

I see scabbards on their left side, just below the left arm. It's easy to mistake as their leg, but it's there I assure you.  But this is for NRU10 Russian Dragoons, not Cuirassiers (I'm a bit confused as to which you're inquiring).

Your correct, I mistitled this thread! (I had just painted the Curassier when I noticed the missing scabbard on the Dragoons)

There is something behind the leg, barely visible, I presume thats the scabbard.