Adding second fan/stirrer

Has anyone had success on this venture? I’m building a flowcell piorector expansion, a la:

and will need to attach at least 4 pumps in order to exchange media from the larger culture vessel and add some feed and pH adjustment medias. I went ahead and ordered this:

to see if I could add more PWMs. I’m a little worried though about how easy attaching the motor cables will be underneath the baseplate for the Pioreactor. Does anyone have thoughts or advice on this?
Thanks.