This is the one I am referring to.
I have one of those. Even after slitting the closed end it's a bit messy and I had to use a rag.
If you can let the bike sit a while, then try the balloon/baggie method of putting your oil in the baggie, putting the end of the cable in the baggie, use a rubber band to seal it, and let it hang on a string from the rafters. If not, I've been doing what Bare does. Neither muss nor fuss, no spray all over, no soaked rags, just a lubed cable. And you don't have to wait for oil to come out on the engine side. Get a good amount in and it will work it's way down via gravity and repetitive use.