Have not seen that kind of upgrade yet. Mine are simple (look factory also). I'm sure the good solder back then always looked good.
Not the two I have seem! Solder rosin all over, etc. Not bad, just not clean! But I am sure there were degrees of craftsmanship! I know this particulat upgrade is not factory or anything. I was just surprised by how clean it all looks. Nice for a change!
Ill look at mine but ram is replaced of course, to be 512, and my board have a small board right above the place your cable plugs in. It looks more like a stand off.
That is what I have seen in the past. This plug is a new one to me and all my searches have not shown it to be typical. Which is why I concerned about doing a plug an play. I don't want to toast an original mobo!
