Z32 Platinum pro plus ic7 and dual wideband

[1cra_Z_TT]

I am trying to figure out the correct way to connect the ic7 dash and dual wide band to my haltech platinum pro plug in for my 91 300ZX TT. I currently have it connected as listed below

Haltech platinum pro --->haltech dual wideband via can cable ---> haltech can hub ----> hub to ic7 dash (furthest port away)

Where do i plug in my io expander? Can i plug it into the can hub or does it have to be plugged into the other port in the wideband box as shown in the diagram that came with the wideband kit?

Thanks in advance