MSI does not include the bracket for the secondary NVME SSD slot in the box with the laptop, you have to contact their RMA service for them to send you the bracket !

So that is what I did, and this model is as close of a replica as I could get it. The original is made out of thin sheet metal, so I don't know if it is 3d-printable as-is.

This one is based on the model for the MSI Katana 15 B13VGK, it is most probably compatible with other laptops of the same line.

I uploaded the .f3d file if someone wants to remix it into a version easier to 3d print.

(The picture is the original part from MSI)

You can find the printable version on @steel_wire_722084 profile ! (link here)