Connecting Yamaha Hs80m to a pc, using Fiio E9

Hello all!

I've recently purchased a set of Yamaha Hs80m speakers, a huge upgrade for me, coming from Logitech z5500.   I'm hoping to connect them to my pc, which has a Titanium Hd soundcard outputting into a Fiio E9 amp.  Now I know the Hs80m's have their own amp, so a passthrough is needed.  What I don't have is the cables needed.  I know the speakers have Xlr outputs, but my amp doesn't have xlr inputs, only Rca's. So which cables would be best for me?  I have two spare phono cables sitting here, maybe a Xlr to phono adapter?

Thanks for you help, much appreciated.