GPS replacement
 

HI, the GPS on my 2002 XKR is stil working OK, but the car came original from Italy and I live in Belgium thus the charts are not usable. Finding up to date chart is not possible anymore so i decided to replace the screen with a Garmin Drive Smart 51. to replace the screen seems not difficult; but i like to connect the audio from the GPS to the input on the existing radio.
Dous any one has the schematics about this?

Regards,
Walter