blitzODE: weld 2 bodies

hi!
i have got a question to all blitzODE users :)

is it possible to 'weld' two meshes.
for example to do this:


these are just two simple blitz cubes declared as blitzODE bodies.
but their act for themselves and i want them to 'weld'!

thank you :)

i mean to do things like this(seen in kODE):

for example add four legs to a table.

I don't know about ODE, but in tokamak you can add several geometries to a ridig body. Perhaps its the same with ODE.

like that:

ODE_dGeomSetBody g1\geom, g2\body

doesnt work either :(..