I took an old swimming foam "noodle" and cut it to a length that covered the square pole. Then, I split it down the middle and wrapped it around the pole. To attach the bikes, I put the first one up against the pole/noodle combo and then took some of the excess noodle and rags to put between the first bike and the second. (I don't want the bikes scratched up). To secure it all, I took a small ratchet strap and started at the loop at the top of the pole and wrapped and weaved the strap around the bikes finally securing it at the bottom of the platform. My logic there is that if the pole was to somehow fall out and the strap was secured only to that, the bikes would go, too. By securing the other end of the strap to the platform, that problem "should" solve itself.