Mine didn't come with a strap either and its right up against the back wall. After several attempts over the years, I settled on using command hooks, 2 pairs, with tarp bungees, and 1 long bungee. My door opens from the right, so I have a pair near the top right and near the bottom right. I took the small circle loop bungees and spaced the pair of hooks with a little tension. Finally took 1 long bungee from the lower right foot across to the upper left hinge. After 2/3 years they are still holding and hasn't popped open during transport and we fill the fridge up to the max the night before we leave. Still be carefull when opening.
Black fridge with white hooks don't look the best but maybe they have better looking hooks now.
