A) ADJUSTMENT AT THE BASE
B) ADJUSTMENT AT THE TOP
I didn't know which I had, I could see the adjuster but it's half way up - is that top or base? So yesterday I had the centre console out to see if I could figure it out:

Hmm, still none the wiser. Then I noticed the little metal clip under the adjustment nut - that's only on the cable that adjusts from the top

So if you force the centre console to the right, peer down the side of the handbrake and can see this nut then you have the handbrake that adjusts from the top. Hoorah. Btw. the other type that adjust from the base is the same one fitted on the D8 from RPO (build number) 07147 (March 1997), there's no RPO for the D9...