more than likely, pre-wire only means wires.
There are many, many options for solar panels and controllers online. Don't feel like you have to buy any 'brand' just because you coach comes with 'it's' prewire connector. These connectors are simply an outside connection for the convenience of 'connecting' a small solar panel to, but chances are you would want much more solar than it can handle anyway, if you truly want to get your money's worth, otherwise you are simply paying for 'solar' that benefits you very little.
A set of 100w panels, with 20amp controller, a set of included wires, connectors, and even mounts, can be found for $250 or so.
But, also, look at your camping/rving style - if you are going to be mostly plugged in at an rv park or campground, you simply don't need any solar. Even while traveling, your vehicle's alternator may be charging your battery bank. So, essentially, the only time solar really comes into play is when you are actually PARKED for many, many hours or days without electricity - and even then, the sun HAS to be out, and the panels HAVE to be pointed at them. Sometimes this is only for a few hours a day, and a small set of panels will not really do a whole lot for you, won't run your a/c units or most any 120v devices or appliances, etc.
also, as a side note, if you only have one or two House batteries, you won't have a lot of 'storage' for any Solar - meaning that if you are serious about solar being a viable electrical option to charge your batteries, you will need more batteries to hold that charge, to be able to have enough to use as you need it!
'14 Thor Palazzo 33.3 compact diesel 100k+miles since '14... US, Alaska, Canada...
AND a '14 Gulfstream Amerlite
AND a '07 ForestRIver Rockwood