retrofit rns 510

I have installed a rns 510 in the passat tdi se that came with the rcd 510. However, I can't find the compass antenna to disconnect it so that the canbus doesn't get double signals. Can anybody help on its location?

In my 2010 CC it was under the rear deck.

Found it

The compass antenna is under the plastic cover on the trunk lid. You have to take the cover completely off to pull the wire loose. However that did the trick and the driver display is now working properly. Thanks to a great vw tech at Flow in greensboro for help