COMAND 2.5 multimedia adapter from uni-trade

[ALC]

Hi guys,
in need of some assistance please
I recently purchased this unit, after some advice from other members that it is an okay unit to use.

NEW Multimedia Interface Adapter Mercedes Comand 2.5 on eBay (end time 30-Mar-10 13:47:12 BST)
(I know the pics shows 2.0 but i have been assured the units are the same, just the cables are different.)

But I seem to be having some issues in getting it to work.

3 weeks ago i ordered this unit, from poland, and after taking a week to arrive, i had been sent the wrong cable, and had to send it back at my expense, finally got the right cable arrive, but after sales support is NIL and IMO not one of the better traders on ebay.

Ok, whinging over...

1st thing is, that on my COMAND, tv tuner is NOT activated , is that essential to make this unit work ?

2ndly, as in the pictures, B,C,D,E cables are simple,
BUT cable A : yellow BUS LOW , white BUS HIGH
I am assuming connect into the C2 socket in slots 17 and 18 , the diagram i have lists these two slots as TV can high and low.
My questions here are, is that the right 2 sockets ?
and
do i remove the 2 in there and plug these in, or add them to the exhisting cable. I ask because the cables already come fitted with the correct connectors to slide into the plug.

Please help, i have no cd player and can only listen to so much radio 1 or kerrang :-/

thanks

AL