Okay, panic over. One of the clips broke off in my struggle so I will need to buy a whole new hose. Which leads me neatly to the answer to my question. The best way to fit the hose to the radiator is to remove the engine block end of the hose from the engine block and then you can pull the hose partially through the chassis leg which will give you ample room to work with to push it right into the radiator and clip it on.
Edit: Parksy87, I read that in the Haynes manual but without enough room there is no way the fitting is going to be able to be pushed in enough for the clips to fit over the end.
Edit: Parksy87, I read that in the Haynes manual but without enough room there is no way the fitting is going to be able to be pushed in enough for the clips to fit over the end.