I opened the trunk, found the battery and only see the negative terminal. How do I get to the positive terminal to attach my amp power wire OR where else might I tap the power wire. I know others have installed there aftermarket subs and I have everything else done except how to get power. I appreciate any info on this as I am out of patience and skin on my knuckles (kind of like the HID conversion but thats done and works great so hopefully lightning will strike twice here). Any pics also appreciated! I tried looking for info on this but didnt find any, if there already is a post, please then post a link to it.