Twin headlights mounting

[assembled]

Hi
does anyone know how twin headlights should be mounted? There are a few different designs and the one I have obtained have only small holes where standard headlight screws are. I could use a long smaller diameter screw and springs to push headlight away from slam panel and a winged nut for adjustment, but everything would be quite loose. I tried searching for images of rear side of these headlights, but could not find any.

[mike22861]

I have a set of morettes at home waiting for me to do a LED conversion when I finish work I will have a look at the mountings