I agree they certainly look like the original side supports for the radiator. These were soldered on the bottom end and the top end which wrapped around at bit on the top.
The three rectangular holes under the hood latch arm are for a clip riveted to the bottom end of the grille shell lacing. The three round holes along the edge are for the bolts which attach the radiator grille shell to the radiator and to the front corner of the fender splash apron.