Garmin GPS Wiring Diagram
 

I have a 1998 29' Scarab and am looking to mount a Garmin GPS unit. I have already completed the hardware part of the installation, but need to complete the wiring. The short version of the story is I am looking to see if anyone has a wiring diagram or location for power and ground. I am assuming it is under the dash and accessed through the cabinet door in the cuddy cabin? Thanks.