On my Speedster I also have hex head screws Holding the grill down and it's easy to turn them using a small wrench for hex head screws. Like a screwdriver with a hex screw on the end). The way I easily put these screws in and out is to grip them with a pair of needle nose pliers (on the threaded part) while I turn them with the wrench. Super easy and eliminates frustration I had as a newbie back in the day. Smart move on your part to install brake lights under the grill---we need all the safety improvements we can add to these cars!