First time uploading photos but I've tried to put a couple up with the rack and clamps used for fastening to the A frame.
As you can see (hopefully) I had the rack come forward a little to give space behind it for storeage and Aux fuel tank, which were all secured to it. Cylinders stood in front. Of course how far foward or back you have it depends on available space and where you need the bottles to sit.
ps if the pics don't load up PM me with your details and I'll email some