Mk3 Radio Wiring ?

Hi,

Does anyone have the wiring diagram for a 2012 mk3 with the basic display.

I have looked at the sticky with the schematics but mine seems to differ slightly, I'm looking to install an after market head unit so any help would be great.

On the left is what it says in the schematics and on the right is what I have in the car with my guess for the functions

BN RD...BATTERY 12V                           1   BN RD...12V +
YE OG...ANTENNA                                  2   YE OG...Ant Amp
BN RD...KL.15 FEEDING                         3   BN RD...12V ACC +
BU......NAV AUDIO IN +                            4   NOT USED
GY......NAV AUDIO IN -                             5   NOT USED
NONE....AUX GROUND                            6   BK......??????
NONE....NOT USED                                 7   NOT USED
VT GN...CENTER SPEAKER -                 8   VT GN...??????
BN YE...LEFT REAR SPEAKER -            9   BN YE...LEFT REAR SPEAKER -
WH BN...LEFT FROT SPEAKER-           10  WH BN...LEFT FRONT SPEAKER -
WH OG...RIGHT FRONT SPEAKER-      11  WH OG...RIGHT FRONT SPEAKER -
BN BU...RIGHT REAR SPEAKER-          12  BN BU...RIGHT REAR SPEAKER -
BK......GROUND                                     13  BK......GROUND
NONE....MM CAN HIGH                          14  BU GY...??????
NONE....MM CAN LOW                          15  VT GY...??????
NONE....NOT USED                               16  NOT USED
BU RD...AUX L +                                    17  BU......??????
BN RD...AUX R +                                   18  VT GN...??????
NONE....AUX 2 OUT SHIELD                 19  NOT USED
BU......CENTER SPEAKER +                 20  BU......??????
BN GN...LEFT REAR SPEAKER +         21  BN GN...LEFT REAR SPEAKER +
WH......LEFT FRONT SPEAKER +        22  WH......LEFT FRONT SPEAKER +
WH VT...RIGHT FRONT SPEAKER +    23  WH VT...RIGHT FRONT SPEAKER +
BN WH...RIGT FRONT SPEAKER +      24  BN WH...RIGHT REAR SPEAKER +

As you can see there are a few differences and I have indicated the wires I'm unsure about
Where do the ANTENNA, ILLUMINATION, SWC +, SWC - and the AMP CONT wires from the new head unit connect to.
there are also REVERSE and BRAKE wires but I assume they connect to the reversing light and the hand brake switch respectively.

Also.....center speaker ????? do I have one ? Is this for the chimes ?

hope someone can point me in the right direction,

Cheers, Gary