This may seem like a stupid question but where exactly does the convertible tack strip (3 pieces) screw on? Does the tack strip fit in the plastic rain gutter? We have the gutter and just ordered the tack strip because we were told we would need it but having a hard time visualizing how it's installed. (our car didnt come with these parts) I checked the old posts and the Fisher manual but didnt see anything that could answer our question. Thanks,
