linux command to open nickel or Access with a sdcard file argument

Hi guys,

The architecture of the kobo software is an enigma to me.

But I understand that any command line can be done (for example with the Tweak).

Is there a way to "simply" start the viewer (default or access) by passing a file adress as argument ?

Thank you for your lenience on this probably stupid question.
I guess that if it was easy, we would have had a tree browser with an "open with" button for quite a long time.

François