To attach, untie cord from the Tension Pro Edge Platform and remove any insert and screws. Align the Fast with the Platform, assuring the middle tab is on the back side where the screws would otherwise be used. Tilt the Fast to insert the front side cord holes first, then press on the back end to snap into position. Rethread cord through the Tension Pro Edge Platform.
To use, simply press on the back side thumb catches between the cord enough to move the middle tab completely off the insert. Then, change out inserts, and once fully inserted press the Fast back down.