Hello. Can anyone help with advising on how the horizontal pole farthest from the caravan attaches to to left and right uprights on a Dorema Hilton porch awning . I've just bought a secondhand Hilton porch awning and am struggling with this bit. The left and right uprights have a lug on them and the cross pole has a clamp type arrangement at each end. I can't for the life of me work out how the 2 fit together.