Hey man, probably you must have figured this out but just in case if you havent, the way i did it was made a group of points inside a sopsolver and then i had used a sbdpinconstraint node and on the constrained object just point it to your sopsolver group.also inside the sbdpinconstraint, on anchorobjpointgroup pos set the default operation to set always and that will help in updating the constraints from sops. Hope this helps