Attaching beam to surface (edit: coupling beam and structural mechanics)

Hi all,

I asked a similar question recently, but I have another question about working with beams.

I am trying to make this object swing using these beams to hold it up. I have made some beams, drawn points at the tops and bottoms of the beams, pinned the top points in place, and put part of the object's surface incident with the bottom points. There is gravity and a force pushing the object.

Edit: I have learned that the beam and structural mechanics physics are not coupled, and I need to couple these. However, I have no multiphysics node or option that I can find. Is there a way to couple these two physics? Thanks!

I have attached the file if you wouldn't mind taking a look. Thanks so much!