There is one set of slots to connect it - or so I'm told: You see, there is another set of inserts (about 6 inches back) that look indential to the inserts that cover the actual slots - some had speculated it was a second set of cargo cover slots, but I'm told that they cover something up that is unrelated to the cargo cover. As it is - they aren't far enough back to fix the cover beyond the 3rd row - and in fact, the placement seems kind of useless, so I haven't bothered to pry off the second set of inserts to look - taking my fellow Mz5-er at his word. Also, the instruction sheet that came with the cover made no mention of a second set of slots.