As John suggests it simply hooks onto inside top of main grill and the pair are then pushed up into a slot on inside of cowl being sandwiched in place at the bottom by the two lower grill bolts also holding numberplate box if fitted.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone