I just point and spray chain oil in the general direction- I tend to ask my local garage if I can do it when the car is being serviced or MOTd. After watching me do it a couple of times they now do it as part of the service - I provide the oil.
Before the winter this year, I tried chain wax and it lasted quite well over the winter.
As you say the sport model is not easy to do anything with at the rear end. You may find access is easier from above by removing the shelf behind the seats then spray downwards
Either way - it`s a fiddle..
