I have the geometry of two separate objects. One is a pelvis sacrum, another is a srew. For my task, I have to put the screw inside a predescibed hole on the pelvis. I did the meshing part in Simmetrix tool, then converted it to abaqus input file, which is to be used in FEBio (fea solver tool)? How can I assemble the two objects (putting the screw inside the pelvis) in FEBio? I have attached an image for clarity