To use the dust hood, simply clamp it to the back edge of the router table. Position it so you have adequate clearance for your workpiece. The V-notch in the two lower layers directs the dust and chips towards the dust port.
The hood is pretty simple. It consists of three layers of plywood. The lower two layers are glued together and then cut to shape. Cut the top to size in the same manner, noting that there is just a slight curve on the front edge of this piece. A hole drilled on the top accommodates the dust port. Now it’s just a matter of gluing the top to the lower layers and rounding all the corners with a disc sander.
This detail from the bottom view shows added dimensions. You might have adjust the opening and dust ports for your system.