Yeah short of spinning it around a lot to see if there is an orientation that works, there isn't much you can do to force it.
You said "there are cables in the way". I don't know what cables you mean, but is it possible to relocate another component to give it enough clearance?
You'll rarely see compatibility lists from companies for these types of things because in a lot of cases it's dependant on three separate manufacturers (case, motherboard, cooler) and that's an awful lot of variables. It's a shame, but if it's possible to return the case then it might be for the best.