Does 'o mean anything or is it just a conective?
Not sure what you mean by connective. It's what I call a "grammar word" or "function word" (as opposed to a content word, like a noun, adjective, verb or adverb). It marks the subject of a sentence. Very common when the subject is a proper name.
Yes, it marks a proper noun or "ia" (3rd person singular) as being the subject of the sentence.