4.27 Question about the multi GPU function to calculate the lightmass (mGPU)

Stop me if i’m wrong:
Now with the 4.27 version it’s possible to calculate GPU lightmass with 2 GPU.
How can i do to enable the second GPU to work?
For the moment only one GPU calculate the Lightmass.
(I have 2 Quadro RTX 4000).
Thank you for trying to helping me.

EDIT: ok sorry i need a NVLINK.