Found these:
http://www.performance-pcs.com/catalog/ind...roducts_id=2512

Does anyone have anything to say about them before I order? Seems pretty standard. I am stuck in the predicament of having a ModStream 520 and a P180 case.

Will the cable affect power consistency or cause any other unforeseen problems?

Let me know, thanks.

Every connector in the chain will cause a voltage/current drop.

While it is possible you will not see any negative effects, using an adapter is not recommended.