Attach assimp model to box2d

I want to use box2d alongside the model I’ve imported in with assimp. Box2D seems to be very good at creating simple shapes, but I haven’t figured out how to tie into a model imported from assimp.

I’m mostly interested in movement and collision and wouldn’t need to interact with the finer points of the model like joints. So the whole model would be one rigid body.

Thanks!