C-Type Spot Lamp behind the front grille

Does anyone know what Spot/Driving light was used behind the grille on the 1953 Le Mans team C-Types? My guess is the Lucas SLR700S, but I don’t have documentation on that.

Le Mans Winner

I’m thinking Flamethrower. MG also used it in the grille of their 1955 EX182 LeMans cars.