If I understand correctly, you have an instance I0 whose port A is a 128-bit bus. The 128 different cells are the same cell repeated 128 times, as in I1<127:0>, each of them will receive 1 bit from I0. If this is the case, you can just connect a wire with a label like "bus<127:0>".
If the 128 cells are I1...I128, you can connect by label. In the schematic window: add->Wire Name and in the pop up window, click on "Bus Expansion" "on" and "Placement" "multiple".