I don't know if this will help or not ...
I have a Thor with 2 TVs -- one in the living area and a Seiki in the bedroom.
When we took possession of the rig we made sure the dealer knew that we wanted to run each TV separately on its own cable box. Initially they looked a little puzzled at the request, stating that whatever the front TV showed was what the back TV would show. Well, we said that we didn't want that and to please do whatever it took to make it so we could watch different programs on each TV.
What we've ended up with are TWO coaxial inputs on the outside of our rig -- one for the front TV and one for the back. The original coaxial cable that went into the Seiki is now worthless (I can see it disappear into the top of the cupboard behind the TV), or maybe just useful if running on the antenna. I've disconnected it, and now use a coaxial cable plugged into a wall receptacle. Depending on whether I'm using my satellite receiver or park cable determines where I hook up the coaxial. If I'm on park cable, then the "source" is TV, and I have to use a splitter on the outside of the rig to get to both TVs. My satellite receiver's source is "AV", and because I have 2 outputs on my Winegard, I just use 2 cables on the 2 outside inputs. Works like a charm, and I can watch different programs on the 2 TVs.
Hope this makes sense. If I could get to the rig & take some pictures I would. But my guess is that you're going to have to add another coaxial connection somewhere in order to get what you want.