Hi DIAZ,
You code in the constructor model is wrong, the array initialization is not properly coded.
You must define such as :
$option = array(
'key' => 'value'
'...' => '...'
)
Then it will work.
I do not have the correct code in my hands, you can check the joomla documentation. But I remember that you simply have to write it in the model constructor, and so your SQL statements will be sent to the other database correctly.
I think you need to edit the table file as well to change the table name.
Hope it helps.