Hi I got a pair of YAMAHA POWERED SPEAKERS YST-M15 , but am missing the wire that goes from 1 speaker to the other. Does any one know what type of wire this takes? The Yamaha yst-M10 we had takes a 1/8" 3 way to 1/8" 3 way, but that does not fit. It looks like a RCA jack but I am not sure if it is a special 3 way RCA or just a 2 way. I would guess it is just a 2 wire RCA but am not sure. Thanks, Tony D.