Not sure about the Tuscany but in our Challenger 37TB, we simply come in through the coax connection in the electric storage compartment. Then, in the coach, I use a splitter before the distribution box. Anyways, there are a number of threads on this forum for hooking it up. I've posted one myself. Not sure this helps with the Tuscany but there you have it.
US Army Retired - Loving The Road Trip