Socks in Appvm connected to sys-whonix

Hi
I want to set a socks 5 in a connection setting of an AppVm connected to sys-whonix. Do I have change something in sys-whonix?
In connection setting there is "Proxy DNS when using socks v5, can I check it?

K. Regards

No.

Make sure to read:

and related pages.

In connection setting there is "Proxy DNS when using socks v5, can I check it?

Yes, otherwise chances are higher DNS would leak. (Only go through Tor and not through the proxy.)