I think (not convinced) that this guide is for the MkI, I do believe it's the same as your MkII:
The picture that follows the guide beneath is here: http://img5.imageshack.us/img5/4160/beosound9000rear.jpg)
Centering of the CD drive mechanism
CD mechanism is spring-suspended to
"Party safe" BeoSound 9000th When you center
CD mechanism, you adjust the tightening of
spring suspension, so you get several different
placement opportunities.
It is very important for the CD player function
that you adjust the spring-suspension correctly!
Spring-suspended on the two adjustment may
set to four different positions:
a) Use this option when the BeoSound 9000 is
placed in the bracket, as shown in Fig. 6 and 7
b) Use this option when BeoSound 9000
either placed on a stand or hang vertically
on the wall, as shown in Fig. 1 and 3
c) Use this option when the BeoSound 9000 is
arranged horizontally on the wall, as shown in Fig. 2.
d) Use this option when BeoSound 9000
either placed flat on a desk or mounted
at a position, as shown in Fig. 4 and 5 This is
factory setting.
Such centers spring suspension
Along with the stand or bracket you will find
a small plastic tool to be used for
following purposes:
> Find the two alignment holes in the floor plate at
BeoSound 9000th
> Pry the two small plastic stoppers (with the
mejselformede end of the tool).
> Insert the other end of the tool (the
arrow-shaped end) and rotate the tool so that the arrow in
each hole pointing in the right direction.
> When you are finished, put the two plastic plugs on
space again.
For all flat and nearly flat positions must
both arrows pointing upwards in the slots when the work is
performed. In the flat position (factory setting)
they point towards the middle of the BeoSound 9000th