ssconvert: how to change text exporter parameters from CLI

[Matías Gutiérrez <matiasgutierrezreto gmail com>]

Hello! This is my first post to list.

I need to convert an xls file to text file, from console (cli) because 
I'm trying to automate a process.
I found that only ssconvert (from gnumeric) really fits my needs, 
because it's able to keep the original format of each spreadsheet cell.

My problem is the following:

I need to use the text exporter which is configurable as man page said. 
But I can't find documentation on how to configure the exporter 
parameters. By gnumeric GUI I know they are parameters like: end of 
line, separator, quote, format (auto, preserve). I tried using gui and 
it was able to export to txt in the format I want. So I like to do the 
same from cli with ssconvert...

I tried ssconvert as follows:

ssconvert -E Gnumeric_stf:stf_assistant myFile.xls myFile.txt

But I need to change some parameters, at least separator, encoding, and 
format.
I didn't find that how to do that in the man page.

Does anybody knows how to pass those parameters or where to find info about?

Thanks in advance,
Matías