SDU coolant flow direction

[Isaac96]

I'm working on installing a S-RDU in my Boxster as detailed on my project thread -- electronics are working well so far, so now it's time to think about cooling.

Looking at the unit, there are four coolant barbs. Two on a small heat exchanger on the top of the unit (the motor cooler), and two on the inverter.

I will be sending flow through the inverter first just to keep temperatures a little lower.

However, is there an 'ideal' or at least 'recommended' flow direction for each part?

Thanks!
-Isaac

(I'd attach pictures but the forum isn't allowing it? only tried .png, probably just another bug in the new software.)

[EV_Builder]

Originally they are connected parallel. cant tell you the in or output yet.

[ZooKeeper]

Weber has a newish video on yootoobe, don't recall if it is an SDU specifically however, where coolant flow is explored.