I am not sure what you mean with the "aquaero HI flow" port.
You want to connect the
splity9 Input to the aquaero
aquabus high port.
If you want the D5 Next on the aquabus, you have to configure it to use the RGBpx/aquabus port as aquabus, and connect that port to one of the ports on the splitty9. This requires a special cable.
As to the TT D5 pumps, if
THIS is that pump, then just connect the Molex plugs, set the desired speed & go.
I do not know what the adapter cables you have are for.