Do projection from polydata to a model surface

I’ve tried, but this module seems not to suit for my case.
I already have chest model so I don’t have to use markup points to create the chest wall.
Because the chest wall in breast reconstruction module is created by markup points, and markup points are situated on the breast model, it can create a closed model obviously.
However, in my module, the chest wall model is from CT, and the breast model is from 3d scan, they are aligned but with some distance.
I think these two modules have different ideas. The breast reconstruction model focus on the volume difference between the breasts, but I focus on the exact volume.
So, I still want to ask how to project a breast model on the chest wall model and get its new position.
Thank you! Sorry to ask so many questions.

I try to draw their difference. In the breast reconstruction model, the chest wall latter sticks to the surface model of 3d scan.

Here is how my chest model built. The picture is in the paper you sent.
chest_wall