Fax to filesystem

I just started using freePBX 13 after having asterisk successfully running on a small system for a couüle of trunks and a straight forward, simple configuration including fax.

With freePBX i only see the capability of using fax2mail and mail2fax, but for now I urgently need faxes to be simply stored in the filesystem, because I want a DMS to manage those documents. With asterisk it is for receiving faxes quite easy (sending I didn’t implement yet), but how should I configure it in freePBX? I guess it is not doable by GUI, so I have to configure it in some files. Can I simply add this inbound route to that extensions_forgotthesuffix.conf and remove everything else for this trunk from freePBX?