Bi-wired cables with Kef LS50 speakers

I've just bought KEF Ls 50 speakers. They have two binding posts, and the Analysis Plus cables I have now (and would like to keep) are bi-wired. Should I used one set of cables and leave the other one hanging? Or should I combine the sets, attaching the two + and the two - spades to their respective binding post? If you had experience with this kind of problem, thank you for letting me know.  Carrard