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When you set it up in the wind, you anchor the flap with the eyelet facing in to the wind. This holds everything in place. Once it is expanded you go to all four sides and attach the straps to the ice anchors.
I anchored the corners, what do you mean by straps?
http://cgi.ebay.com/2009-KillZone-Igloo-XL-4-Person-Ice-Fishing-Shanty-5L_W0QQitemZ140299734449QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item140299734449&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50Looks interesting and inexpensive
What the heck did you tie that strap to?