Winegard 360 Antenna Connection

In our Keystone Fuzion 429, we have always had problems with our TVs not finding channels. Early in our ownership of the RV, a dealership had replaced our original antenna with a Winegard 360. Of course, we assumed they checked it out properly. When I had told them we were not getting channels, they told me the antenna was working just fine. Frustrated with this, we had been periodically using an inexpensive window-style flat HD TV antenna you might by at a store. That worked just fine but was a bit ugly. Finally, we decided to take a look at the KeyTV junction box to see if it was properly connected. Turns out, no.