I am having a difficult time finding out what is happening at the top of the clutch lever. As shown on the Chandler bike (white twin), the knob looks like it perhaps moves up/down to release from the guide that mounts below the tank. Anyone know what's going on here? Is there a catch that grabs the guide? It is different than the "T" handle used with the two-speed rear hub (that style rotates and allows the handle to slide). Here is the photo again.