If I'm writing a sentence and simply omitting the last XXX number of words, then it's just a space and then 3 dots. Like this:
I would tell you more about the ellipsis but ...
That's it! If I was omitting XXX number of words from the middle of a sentence or a quote, I would use a space, then 3 dots, then a space then continue.
He said that he was able explain the ellipsis in three languages, with ... being his favourite.
He named several punctuation marks - the full stop, comma ... exclamation mark.