"the dual 110-119 lnb" - This is a Twin. 110 and 119 each have an LNB, and there is also an internal switch. The one that came with the original Dish 1000 is the DishPro Plus Twin. This version has 2 outputs on one side for 2 receivers, and an input on the other side for a 3rd LNB.
"a separate 129 lnb" - this is likely a DP Dual, one LNB with 2 outputs (a Single is the same but with 1 output). Run a line from either output to the LNB In on the DPP Twin. The design called for, IIRC, a 5'(?) length of RG6 looped around the dish to avoid sharp bends and stressing the connectors.