alembic cloth, motion blur how?

Development Rendering
1

Hello

I wonder if that is possible to use ‘previous frame switch node’ to get motion blur for animated alembic cloth.
I found this:

but for me was unclear how to use this node.
please if you someone can help me out.

thank you in advance

2

It would be cool if someone help me to sort this out.
thank you

3

did you find any solution? please share.