Beginning the process of installing the factory sidecar brackets on my 1947 Chief. When I mock-up the front bracket, the left side bracket section fits nicely around the left downtube at the proper angle. The right side bracket section then lines up with the right downtube where it mounts into the brazed lug so it does not mount flush due to the two different thicknesses at the joint. Can anybody tell me if that is how it is supposed to mount or??? Any help/info would be appreciated. Thanks.