The soft fastner goes to the back and the firm outside one faces forward on the tri-zone ones. If you look under the soft tab there is a label which says 'this is the front of the boot'. I can't really tell from the pic but they look right.
ETS from the website..
Q: I am confused about which way the straps go on Tri-Zone Brushing Boots?
A: The soft strap should be fastened first, facing backwards towards the horses tail, this is when the tension is applied. The rough strap should then be pulled forward, facing the horses head. This strap is to make the boot extra secure.