After all the big jobs, I'm stuck on a small one! I've bought a new throttle cable and want to check I am fitting it correctly at the bulkhead. My car is an MPi, and on the engine bay side of the bulkhead there is a rubber tube receptacle approx 1in long that the inner passes through and the outer sits in/against. The end of my cable outer looks like this, with a stepped part at the end (this is the old cable, the new one is the same):

MPi throttle cable by bcjamesmini, on Flickr
How far should I push the cable outer in to the receptacle? Just the small step to the left or the big step too? On the small step I don't really have enough adjustment at the throttle body end. If it's the big step, is there some trick to getting it in as it's very tight with little access.
My replacement cable also has two loose rubber tube sections that slide up and down it's length. Looking at the photo http://www.mra-minis...i-sbb103400.htm on the MRA site where they are shown at either ends of the cable, it looks like one part of it is stuck over the big step. Should I be removing the rubber piece from my bulkhead and replacing it with one of the sliding pieces on the new cable already slid over the big step? I don't want to remove anything I shouldn't to try it as it's so awkward in that space!
Hopefully that all makes sense!
Many thanks,
James