How to properly connect marine generator with floating neutral to Victron Quattro AC IN-2 input?

On the sailing catamaran we have a Victron Cerbo GX, Quattro 24/5000 230V and Paguro 6500, single phase, 230V marine generator, connected to AC IN-2 input. Generator has a floating neutral (the neutral conductor is not bonded to the generator frame).
Quattro using ground relay in invertor mode, I set it in VE Configure, works fine.
To comply with safety standards, I want Quattro to do neutral to ground connection, when generator connected to AC IN-2 is running. Did not find this option in settings, did not find any VE assistant to close ground relay with any of AC IN inputs.
Is there any way to do it?