ok,was having a new water pump/cam belt etc fitted today,so asked the blokes at the garage to fit my Forge TIP-their saying that the end of the TIP that goes to the turbo wont fit onto the turbo end,rather that its meant to fit into the turbo and get bolted flush to it,but the end of the TIP is to small,as if there's a extra part needed?

i have no doubt ive not described what they meant to well,i trust them to know what their on about,and having just looked at a picture else where on here of a turbo,i kind of understand what they mean,so what am i missing?
i wasnt there when they tried it,so im writting this kind of blind-i know several of you good people have silicone TIP's,so any advice would be much appreciated.