Sorry, but I don't think I can share a screenshot on this webpage, but I do have a question. Are you possibly using a older version of the mod? As I did see the original picture for the mods logo doesn't have a fuel tank on it. It should be on the bottom right corner of the launch pad, with a pipe attachment point on its right.
I see it! It definitely blends it and it isn't really apparent on what it is for, nor is it shown on the mod info page.
PSA:
There is a small fuel tank that takes light oil on the bottom right of the silo. Connect that and it'll fill up with oil and how much oil that is in their determines the range of the missile.