Are we talking about the regular D5 pump or the USB variant with aquabus interface?
If it is the normal pump you can only connect it to the fan ports using
this adapter for example. Only one pump per channel!
If it is the USB variant you can use an aquabus y-cable to connect both to the aquabus highspeed port of the aquaero. Before you do this you have to change the aquabus ID numbers via USB in the system tab of the pumps.