Winnebago Via 25T Satellite Connection

On my 2013 Winnebago 25T the front satellite connection has 2 cable connections, one from roof and one from portable. Rear bedroom has only 1 cable connection from roof. I already have a VIP 211k from my last rv, and I plan to buy a Dish Tailgater and either an extra VIP 211k or a VIP 211Z. Two questions: How can I change the bedroom roof connection to a portable satellite connection and is a VIP 211Z a better choice than the a second VIP 211K?