This picture was taken after-the-fact, so you need to use your imagination to understand how this works. Install the table on temporary riser blocks (this is necessary to allow clearance for the router bit between the table saw and extension table). Temporarily place the Aluminum T-Track in the template. Place one end of the hardwood alignment jig in the table saw miter track, and the raised end in the Aluminum T-Track to accurately position the template. Secure the template with clamps, and cut the first dado. Move the template and jig to cut the second dado.