Do you want one Hopper or two? How are the dishes currently wired? If you only want one Hopper you can just run a line from the 129 wing to the LNB in port on the DPP Twin and then install the solo node. If you want two Hoppers you'd have to use a DPP switch of some kind.
Yes two Hoppers. So I will need a switch. Is there an advantage from one to the other?