Audio Help - Finding Ground location??

[yellow02]

I know a few of you have system installed in your cars, therefore i was wondering if someone could help me find a ground in the trunk of my GTS. I already had to drill a small hole to get to the battery, hopefully i wont have to drill more. I can get a ground off where the factory amp is located, but i dont know if it is right to use this location.

 

[GTSnake]

There are plenty of grounds. Look behind the b-pillar trim. you can use the stock amp ground, defroster ground just above it or the grounds to the frame roll bar below the roof.