i managed to visualize a dumbbell in the hands of the StandingModel. Unfortunately there are two dumbbells now, one in the right, and one in the left hand, although i added only one (and i did not drink to much this morning ;)). I would like to have only one in the right hand.
Here is what i inserted into Body\AAUHuman\Arm\Seg.any, in the AnySeg Hand section.
Then you can see that this dumbbell STL file is now attached only on the right hand.
But as we know, this is just STL file.
If you want to see the effect of dumbbell weight,
then you have to define an AnySeg with proper mass properties.
And make a connection(kinematically and kinetically) between the right hand and this new AnySeg.