If I'm understanding you correctly, you've just ordered a new one? If so, all of the 2017 trailers and I believe the 2016 models as well come pre wired. Installation involves removing two screws on the bracket that's already installed, plugging in a headphone jack type connector from the camera to the wire on the camper, then attaching it with four screws. Takes about 15 minutes (and probably only 5 if you've done one before) to install. Camera is bluetooth connected to the monitor and runs when the marker lamps are on.
A few notes:
I found the kit on Amazon WITH the bracket (that's already installed on the trailer) was actually cheaper than the one without it.
Make sure you order the one with 48 in the model number.
The IR is nice for low light backing and it actually works pretty well.
It gives you a little better view for changing lanes in traffic. Sometimes I find it hard to judge whether or not somebody is hanging out right at the edge of the trailer or if they're farther behind than they look in the mirrors.
2012 Chevy Tahoe LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition