I'm in the process of installing a Kicker ZX700.5 amp that requires a 4 ga. ground in an '06 vert. I don't see anything in the trunk I can use. Are you drilling holes somewhere? I'd prefer not to drill if I don't have to. Thanks.

 

best place would have to be scrap off some paint on the strut mount and drill a hole a bit smaller then a screw and thread the whole then put in the screw with the ground, or you could run the wire up to the engine bay

 

I know on my 07 coupe there is a bolt in the trunk right behind my back seat, thats where I grounded mine.

 

same as 07VistaGT, mine is grounded on a bolt behind the back seat's, right between the back rests.