Feel the sides of the cabinets
Three bass drivers per cabinet. One side has two drivers, the powered one about halfway up and a passive below it, while the other side just has one passive at the bottom. You can feel through the sock to see which side has the high mounted woofer. If your speakers have the powered drivers on opposite sides of the respective speakers resulting in a mirror image pair, you have the right speakers. If not, call BB and demand the proper matching speaker. And if that's the case, how f*ing lame of BB!