If the US33 is the last board and you are using the T-clips, you will have to put both the starter clips and the T-clips into place first, and then slide the board in from the side. Please ensure that all parts are properly aligned, so that the board may be easily be able to slide into place. If the US33 is the last board and the mini gap clips are being used, the only way is to secure the board is by using the outside edge with a screw, and toe nailing either from above, or below to secure the board in.