Most factory hard tops had a rear windshield wiper, most aftermarket tops do not, at least thiis is true for TJ and JK, absolutely, but I'm not positive about YJ. There have been a LOT of people making hardtops over the years.
Wiring plugs on a YJ? Send a note to JpDocDave or WhiteYJ or NavyChief (or some others I'm forgetting right now) with electrical questions. I'm not sure what wiring you have. On my CJ, there is zero wiring for the hardtop, not even for a dome light. I don't know when that started changing.