I see that you've attached the side struts at the LNBF holder. That is the way it is shown in the diagram. I've seen them attached in the lower position also. I tried it briefly in both places. I didn't note a difference after adjusting the dish elevation slightly. I just left them on the lower position to allow for easier LNBF holder swaps and because Titanium has pictures on Facebook of his C1-PLL C-Band PLL LNBF and CS1 Conical Scalar on a 1.2m using the lower hole. I am curious about the purpose for the lower hole if it isn't for the struts.
Well, we need to get Titanium involved in this discussion.. I noticed that hole in the bar too, but there wasn't a second bolt to connect both the LNB holder separate from two rods.