Tiamat v2 Sub / Center 3.5mm & Pre-Outs

Hi I'm using the Tiamat to plug into the pre-outs (RCA outputs) on an AVR, and I couldn't see anywhere in the manual, or on here what the official configuration should be to set it up, particularly for the subwoofer and center channels. I don't wish to blow out any of the speakers by plugging the center channel into the subwoofer, so could you please tell me which is configured to the red side of an RCA converter cable (like this) to avoid any mishaps? I wouldn't want to invalidate any clauses in returnability, etc! :-o Best Eliot ------------ PS - I've asked the community about AVR connectivity, and if I should use headphone amps for each channel, but I'd appreciate your input, too, if you have any. :-)