The little plastic tabs were just slightly back from the forwardmost point where the black cowling and the red/silver part meet. While they weren't really strong, they were in the best location for keeping the cowling down. I haven't had a problem with my cowling lifting off and I amd holding it down with a couple strips of heavy duty/industrial strength velcro strips that basically pull down from where I have cemented the mating velcro bits toward the part of the cowling that is just above the headlight shell. The velcro straps cinch around bracket that is below and on either side of the headlight (or maybe it is the lowermost portion of the headlight bracket - I can't recall).. Once one is moving with some speed, the air pressure tend to push downward on that black piece and keep it in place - unless it manages to get under the front lip of the black cowling to lift it.
Do you still have the inner black plastic fairing cover pieces that snap around the top of the fork tubes on each side? I think that they help in preventing much air from trying to sneak in around the headlight and under the top black cowling piece. But, they are a PITA to fettle with anytime once has to change for oil, route a cable, etc. etc.
I'll see if I have any pictures - but it isn't easy getting a good picture, or even my hands, up in there.